GP Lithium Coin Batteries CR2032. £1.99. 1. 1, 2, 4, 5. 1 - £1.99, 2 - £2.99, 4 ... Page 1 of 3. Show number item. Show number item, Show 10, Show 20, Show 50 ...

They have put you on a deemed tariff rate and will now contact all ex-PfP Energy customers to let them know their personalised tariff information.

Generates an integral number. The number can be positive or negative and its maximum absolute value depends on the size parameter.

PfP Energy customers will be transferred to a new contract with British Gas from Saturday 11 September 2021. British Gas will then contact all customers to explain what happens next.

If you have switched and owed PfP Energy money, including if you were paying this money back, the administrators or British Gas will be in contact with you to discuss repayment arrangements.

For clear advice on how to shop, see our guide for domestic consumers: How to switch and shop for a better deal, and for non-domestic consumers: Switching your business to a new energy tariff or supplier.

Will I be on a different contract with British Gas? Will I pay more? Read more They have put you on a deemed tariff rate and will now contact all ex-PfP Energy customers to let them know their personalised tariff information.  You can shop around or ask them to put you on a different tariff. You won’t be charged any exit fees. For clear advice on how to shop, see our guide for domestic consumers: How to switch and shop for a better deal, and for non-domestic consumers: Switching your business to a new energy tariff or supplier.

If your question isn’t answered here and you have concerns about your energy supply, problems or complaints, you can contact:

I don’t want a contract with British Gas. Can I switch? Read more Our advice is not to switch immediately, but wait until British Gas has been in touch with you. They will contact you with personalised information about your tariff. Your account will be fully set up with them in the coming weeks. British Gas will contact you at this point to confirm once this has happened. If customers wish to change their tariff or switch supplier, they should ask to be switched to another British Gas tariff, or shop around. You won’t be charged any exit fees. Waiting for them to contact you will be the smoothest way to have any credit balances you had with PfP Energy honoured by British Gas. For clear advice on how to shop, see our guide for domestic consumers: How to switch and shop for a better deal, and for non-domestic consumers: Switching your business to a new energy tariff or supplier.

Each use of label in your property results in a separate table of test case distribution in the output. If this is not what you want, use tabulate.

Agenda 18 October 2017. Download Now. View the minutes and agendas from the LAF meetings. Size: 498.96 KB; Extension: PDF PDF) ...

Will British Gas take on my unresolved complaint to PfP Energy? Read more British Gas is not required to take on any unresolved complaints relating to PfP Energy. However, if you believe your complaint is still ongoing, once British Gas contact you, please discuss with them how the issue can be resolved. If your complaint was open with the Ombudsman, they will be in contact with you in due course to discuss next steps.

WARNING: Users working on the internals of the Set type via e.g. Data.Set.Internal should be aware that this instance aims to give a good representation of Set a as mathematical sets but *does not* aim to provide a varied distribution over the underlying representation.

Nondeterministic choice: p1 .&. p2 picks randomly one of p1 and p2 to test. If you test the property 100 times it makes 100 random choices.

You should only use genericCoarbitrary for data types where equality is structural, i.e. if you can't have two different representations of the same value. An example where it's not safe is sets implemented using binary search trees: the same set can be represented as several different trees. Here you would have to explicitly define coarbitrary s = coarbitrary (toList s).

I’ve left PfP Energy but I owe them money. Will I need to pay it back to British Gas? Read more If you have switched and owed PfP Energy money, including if you were paying this money back, the administrators or British Gas will be in contact with you to discuss repayment arrangements.

I’ve already cancelled my direct debit. Should I do anything? Read more You don't need to worry if you’ve already cancelled your direct debit. British Gas will be in touch with you to set up a new customer account and direct debit. They will also be able to tell you what will happen with any credit balance you may have with PfP Energy.”

However, if you believe your complaint is still ongoing, once British Gas contact you, please discuss with them how the issue can be resolved.

The default implementation returns the empty list, so will not try to shrink the value. If your data type has no special invariants, you can enable shrinking by defining shrink = genericShrink, but by customising the behaviour of shrink you can often get simpler counterexamples.

The use of HafcoVac Anti-Static vacuums are a safe, reliable and cost-effective choice for facilities working with substances and materials that can produce ...

Large x: by default, QuickCheck generates Ints drawn from a small range. Large Int gives you values drawn from the entire range instead.

Tests a property, using test arguments, produces a test result, and prints the results and all test cases generated to stdout. This is just a convenience function that combines quickCheckWithResult and verbose.

$(polyQuickCheck 'prop) means the same as quickCheck $(monomorphic 'prop). If you want to supply custom arguments to polyQuickCheck, you will have to combine quickCheckWith and monomorphic yourself.

Note: if the property times out, variables quantified inside the within will not be printed. Therefore, you should use within only in the body of your property.

Note: for technical reasons, the test case is printed out after the property is tested. To debug a property that goes into an infinite loop, use within to add a timeout instead.

Check that all coverage requirements defined by cover and coverTable are met, using a statistically sound test, and fail if they are not met.

The class of properties, i.e., types which QuickCheck knows how to test. Typically a property will be a function returning Bool or Property.

Generates a random element in the given inclusive range. For integral and enumerated types, the specialised variants of choose below run much quicker.

Note: the bizarre return [] in the example above is needed on GHC 7.8 and later; without it, quickCheckAll will not be able to find any of the properties. For the curious, the return [] is a Template Haskell splice that makes GHC insert the empty list of declarations at that point in the program; GHC typechecks everything before the return [] before it starts on the rest of the module, which means that the later call to quickCheckAll can see everything that was defined before the return []. Yikes!

That's because GHCi will default any type variables in your property to (), so in the example above quickCheck was really testing that () is equal to itself. To avoid this behaviour it is best practise to monomorphise your polymorphic properties when testing:

The basic building block for Function instances. Provides a Function instance by mapping to and from a type that already has a Function instance.

If you had a Smart Export Guarantee (SEG) tariff with the failed supplier, once we've appointed a new supplier you will need to agree a new SEG tariff for your exported electricity to continue to receive SEG payments. You may need to find another SEG supplier if the new supplier is not a SEG licensee.

Test all properties in the current module, using a custom quickCheck function. The same caveats as with quickCheckAll apply.

Replacement for BF-175 (for FLOWTRON) and others ; Returns. Accepted within 30 days. Buyer pays return postage ; BULBS AND BATTERIES (33490) ; Detailed seller ...

The QuickCheck manual goes into detail on how to write good generators. Make sure to look at it, especially if your type is recursive!

These functions test all properties in the current module, using Template Haskell. You need to have a {-# LANGUAGE TemplateHaskell #-} pragma in your module for any of these to work.

When you use checkCoverage, QuickCheck uses a statistical test to account for the role of luck in coverage failures. It will run as many tests as needed until it is sure about whether the coverage requirements are met. If a coverage requirement is not met, the property fails.

If all this leaves you bewildered, you might try shrink = genericShrink to begin with, after deriving Generic for your type. However, if your data type has any special invariants, you will need to check that genericShrink can't break those invariants.

To generate random values of type Fun a b, you must have an instance Function a. If your type has a Show instance, you can use functionShow to write the instance; otherwise, use functionMap to give a bijection between your type and a type that is already an instance of Function. See the Function [a] instance for an example of the latter.

Run a generator. The size passed to the generator is always 30; if you want another size then you should explicitly use resize.

Used for random generation of functions. You should consider using Fun instead, which can show the generated functions as strings.

If you want to use monomorphic in the same file where you defined the property, the same scoping problems pop up as in quickCheckAll: see the note there about return [].

It is worth spending time thinking about what sort of test data you want - good generators are often the difference between finding bugs and not finding them. You can use sample, label and classify to check the quality of your test data.

Return a value in the witnesses field of the Result returned by quickCheckResult. Witnesses are returned outer-most first.

Note: for technical reasons, the test case is printed out after the property is tested. To debug a property that goes into an infinite loop, use within to add a timeout instead.

Tests a property and prints the results and all test cases generated to stdout. This is just a convenience function that means the same as quickCheck . verbose.

Warning: any random values generated inside of the argument to ioProperty will not currently be shrunk. For best results, generate all random values before calling ioProperty, or use idempotentIOProperty if that is safe.

Used to generate a function of type a -> b. The first argument is a value, the second a generator. You should use variant to perturb the random generator; the goal is that different values for the first argument will lead to different calls to variant. An example will help:

By default up to 100 tests are performed, which may not be enough to find all bugs. To run more tests, use withMaxSuccess.

If you want to get the counterexample as a Haskell value, rather than just printing it, try the quickcheck-with-counterexamples package.

Tests a property, produces a test result, and prints the results and all test cases generated to stdout. This is just a convenience function that combines quickCheckResult and verbose.

I’m in credit with PfP Energy. Will I get my money back? Read more British Gas will honour customers’ credit balances for both current and past customers of PfP Energy who are owed money. British Gas will review details of any debt or credit on your account. Wait for them to contact you with the relevant instructions. They will also be able to answer any questions you may have on debt or credit on your account. The review process may take a several weeks as British Gas needs to receive and review records from PfP. When calculating your credit balance, they will deduct any unbilled charges for your supply by PfP.

For example, listOf, which uses the size parameter as an upper bound on length of lists it generates, can be defined like this:

$forAllProperties has type (Property -> IO Result) -> IO Bool. An example invocation is $forAllProperties quickCheckResult, which does the same thing as $quickCheckAll.

Note: for technical reasons, the test case is printed out after the property is tested. To debug a property that goes into an infinite loop, use within to add a timeout instead.

To use QuickCheck on your own data types you will need to write Arbitrary instances for those types. See the QuickCheck manual for details about how to do that.

For Use with SMC Auto Switches ( Reed Switches) D-M9PSAPC | TED.

British Gas will review details of any debt or credit on your account. Wait for them to contact you with the relevant instructions. They will also be able to answer any questions you may have on debt or credit on your account. The review process may take a several weeks as British Gas needs to receive and review records from PfP. When calculating your credit balance, they will deduct any unbilled charges for your supply by PfP.

The standard parameters used by checkCoverage: certainty = 10^9, tolerance = 0.9. See Confidence for the meaning of the parameters.

Invoke as $(polyQuickCheck 'prop), where prop is a property. Note that just evaluating quickCheck prop in GHCi will seem to work, but will silently default all type variables to ()!

In the following counterexample, the list must start with "bbbbbbbbbb" but the remaining (infinite) part can contain anything:

Our advice is not to switch immediately, but wait until British Gas has been in touch with you. They will contact you with personalised information about your tariff.

Test a polymorphic property, defaulting all type variables to Integer. This is just a convenience function that combines verboseCheck and monomorphic.

genericShrink is a combination of subterms, which shrinks a term to any of its subterms, and recursivelyShrink, which shrinks all subterms of a term. These may be useful if you need a bit more control over shrinking than genericShrink gives you.

QuickCheck provides Arbitrary instances for most types in base, except those which incur extra dependencies. For a wider range of Arbitrary instances see the quickcheck-instances package.

If you want to use polyQuickCheck in the same file where you defined the property, the same scoping problems pop up as in quickCheckAll: see the note there about return [].

There is no generic arbitrary implementation included because we don't know how to make a high-quality one. If you want one, consider using the testing-feat or generic-random packages.

Test all properties in the current module. This is just a convenience function that combines quickCheckAll and verbose.

For example, listOf, which uses the size parameter as an upper bound on length of lists it generates, can be defined like this:

(50 mm). PLF-12ADLX-B. Silver Braze, 2 in. (50 mm). Soft Solder, 4 in. (90 mm) ... PLF-12ADLX-B, B, Forward. PLF-5ADLX-B, B, Forward. PLF-5ADLX-MC, MC, Forward.

Discards the test case if it does not complete within the given number of microseconds. This can be useful when testing algorithms that have pathological cases where they run extremely slowly.

For clear advice on how to shop, see our guide for domestic consumers: How to switch and shop for a better deal, and for non-domestic consumers: Switching your business to a new energy tariff or supplier.

Should I cancel my direct debit? Read more You don’t need to cancel your direct debit, but can if you wish to. British Gas will be in touch with you about whether your existing direct debit will remain in place, or whether they will set up a new direct debit.

PfP Energy’s administrators Read more Administrators: Alvarez & Marsal Europe LLP Address: Alvarez & Marsal Europe LLP, Suite 3 Regency House, 91 Western Road, Brighton, BN1 2NW. Telephone: +44 (0) 20 7715 5200 Email: PFPESL@alvarezandmarsal.com

How certain checkCoverage must be before the property fails. If the coverage requirement is met, and the certainty parameter is n, then you should get a false positive at most one in n runs of QuickCheck. The default value is 10^9.

Optional; used internally in order to improve shrinking. Tests a property but also quantifies over an extra value (with a custom shrink and show function). The Testable instance for functions defines propertyForAllShrinkShow in a way that improves shrinking.

Test all properties in the current module. The name of the property must begin with prop_. Polymorphic properties will be defaulted to Integer. Returns True if all tests succeeded, False otherwise.

If you want to use polyVerboseCheck in the same file where you defined the property, the same scoping problems pop up as in quickCheckAll: see the note there about return [].

For statistical reasons, checkCoverage will not reject coverage levels that are only slightly below the required levels. If the required level is p then an actual level of tolerance * p will be accepted. The default value is 0.9.

Shrinks the argument to a property if it fails. Shrinking is done automatically for most types. This function is only needed when you want to override the default behavior.

The QuickCheck manual gives detailed information about using QuickCheck effectively. You can also try https://begriffs.com/posts/2017-01-14-design-use-quickcheck.html, a tutorial written by a user of QuickCheck.

There is a fair bit of boilerplate in the code above. We can avoid it with the help of some generic functions. The function genericShrink tries shrinking a term to all of its subterms and, failing that, recursively shrinks the subterms. Using it, we can define shrink as:

British Gas will contact PfP Energy customers with more information about their contract, tariff and any credit owed to you. If your question isn't answered here, you should contact the British Gas customer contact team.

... cwt v O B condensery 195 do O B Seattle supply ... 3000035 00 E Wash Net Gems 1 cold storage ton ! ... cwt 5 60 Milk —Per case per lOftcase lots: Co ...

Your account will be fully set up with them in the coming weeks. British Gas will contact you at this point to confirm once this has happened.

A final gotcha: we cannot define shrink as simply shrink x = Nil:genericShrink x as this shrinks Nil to Nil, and shrinking will go into an infinite loop.

Prints out the generated test case every time the property fails, including during shrinking. Only variables quantified over inside the verboseShrinking are printed.

Note: If the coverage check fails, QuickCheck prints out a warning, but the property does not fail. To make the property fail, use checkCoverage.

Tests a property, using test arguments, and prints the results and all test cases generated to stdout. This is just a convenience function that combines quickCheckWith and verbose.

This appointment will take effect on Saturday 11 September 2021, following a competitive process Ofgem has run to get the best deal for customers.

Provides a Function instance for types with Bounded and Enum. Use only for small types (i.e. not integers): creates the list [minBound..maxBound]!

Putzmeister Spare Part HYDRAULIC CYLINDER 2100-130/80 | 433195 | DM Machinery - Spare Parts For Concrete Equipments.

Uniformly generates a fractional number. The number can be positive or negative and its maximum absolute value depends on the size parameter.

Collects information about test case distribution into a table. The arguments to tabulate are the table's name and a list of values associated with the current test case. After testing, QuickCheck prints the frequency of all collected values. The frequencies are expressed as a percentage of the total number of values collected.

Generates an integral number from a bounded domain. The number is chosen from the entire range of the type, but small numbers are generated more often than big numbers. Inspired by demands from Phil Wadler.

Some customers with newer models of smart meter should see no loss in smart functionality. Unfortunately customers with older smart meter models will likely see a loss of smart functionality. British Gas will upgrade these older meters for any customers who request it.

Performs an IO action every time a property fails. Thus, if shrinking is done, this can be used to keep track of the failures along the way.

To start using QuickCheck, write down your property as a function returning Bool. For example, to check that reversing a list twice gives back the same list you can write:

...we can add a coverage requirement as follows, which checks that LogIn, LogOut and SendMessage each occur at least 25% of the time:

Takes a list of elements of increasing size, and chooses among an initial segment of the list. The size of this initial segment increases with the size parameter. The input list must be non-empty.

Call Us. Customer Service 855.571.2100. Need help with SupplyManager? 800.422 ... Midmark, Drive Medical, 3M, and Thermo Fisher Scientific. And for your ...

Note: for technical reasons, the test case is printed out after the property is tested. To debug a property that goes into an infinite loop, use within to add a timeout instead.

Enquiries Read more British Gas will contact PfP Energy customers with more information about their contract, tariff and any credit owed to you. If your question isn't answered here, you should contact the British Gas customer contact team. Website: https://www.britishgas.co.uk/help-and-support/ Phone: Credit Customers: 0333 202 9753 Phone: Pay-As-You-Go Customers: 0333 202 9691

If you are using a recent GHC, there is a default definition of coarbitrary using genericCoarbitrary, so if your type has a Generic instance it's enough to say

Generates an integral number. The number is chosen uniformly from the entire range of the type. You may want to use arbitrarySizedBoundedIntegral instead.

Warning: during shrinking, the I/O may not always be re-executed. Instead, the I/O may be executed once and then its result retained. If this is not acceptable, use ioProperty instead.

These types do things such as restricting the kind of test data that can be generated. They can be pattern-matched on in properties as a stylistic alternative to using explicit quantification.

Prints out the generated test case every time the property is tested. Only variables quantified over inside the verbose are printed.

Given a property, which must use label, collect, classify or cover to associate labels with test cases, find an example test case for each possible label. The example test cases are minimised using shrinking.

When will I be switched from PfP Energy to British Gas? Read more PfP Energy customers will be transferred to a new contract with British Gas from Saturday 11 September 2021. British Gas will then contact all customers to explain what happens next. If you haven't heard from them within a few days, please get in contact using the details below: Website: https://www.britishgas.co.uk/help-and-support/ Phone: Credit Customers: 0333 202 9753 Phone: Pay-As-You-Go Customers: 0333 202 9691

You can read more about our powers to protect consumers when suppliers go out of business in our guidance: Supplier of Last Resort process.

If you are using checkCoverage as part of a test suite, you should be careful not to set certainty too low. If you want, say, a 1% chance of a false positive during a project's lifetime, then certainty should be set to at least 100 * m * n, where m is the number of uses of cover in the test suite, and n is the number of times you expect the test suite to be run during the project's lifetime. The default value is chosen to be big enough for most projects.

InfiniteList xs _: guarantees that xs is an infinite list. When a counterexample is found, only prints the prefix of xs that was used by the program.

Note: for technical reasons, the test case is printed out after the property is tested. To debug a property that goes into an infinite loop, use within to add a timeout instead.

What will happen to my Smart Export Guarantee tariff? Read more If you had a Smart Export Guarantee (SEG) tariff with the failed supplier, once we've appointed a new supplier you will need to agree a new SEG tariff for your exported electricity to continue to receive SEG payments. You may need to find another SEG supplier if the new supplier is not a SEG licensee.   New SEG licensees are only obliged to make payments for exported electricity when a new SEG contract starts. List of SEG Licensees

Checks that at least the given proportion of successful test cases belong to the given class. Discarded tests (i.e. ones with a false precondition) do not affect coverage.

Maximum number of successful tests before succeeding. Testing stops at the first failure. If all tests are passing and you want to run more tests, increase this number.

Ordinarily, a failed coverage check does not cause the property to fail. This is because the coverage requirement is not tested in a statistically sound way. If you use cover to express that a certain value must appear 20% of the time, QuickCheck will warn you if the value only appears in 19 out of 100 test cases - but since the coverage varies randomly, you may have just been unlucky, and there may not be any real problem with your test generation.

You don't need to worry if you’ve already cancelled your direct debit. British Gas will be in touch with you to set up a new customer account and direct debit. They will also be able to tell you what will happen with any credit balance you may have with PfP Energy.”

Map a shrink function to another domain. This is handy if your data type has special invariants, but is almost isomorphic to some other type.

Will my smart meter continue to work? Read more Some customers with newer models of smart meter should see no loss in smart functionality. Unfortunately customers with older smart meter models will likely see a loss of smart functionality. British Gas will upgrade these older meters for any customers who request it.

Note: If the coverage check fails, QuickCheck prints out a warning, but the property does not fail. To make the property fail, use checkCoverage.

There are some restrictions on command sequences; for example, the user must log in before doing anything else. The function valid :: [Command] -> Bool checks that a command sequence is allowed. Our property then has the form:

Each use of collect in your property results in a separate table of test case distribution in the output. If this is not what you want, use tabulate.

We are a non-ministerial government department and an independent National Regulatory Authority. Our role is to protect consumers now and in the future by working to deliver a greener, fairer energy system.

Should we replay a previous test? Note: saving a seed from one version of QuickCheck and replaying it in another is not supported. If you want to store a test case permanently you should save the test case itself.

You should prefer tabulate to label when each test case is associated with a varying number of values. Here is a (not terribly useful) example, where the test data is a list of integers and we record all values that occur in the list:

Implication for properties: The resulting property holds if the first argument is False (in which case the test case is discarded), or if the given property holds. Note that using implication carelessly can severely skew test case distribution: consider using cover to make sure that your test data is still good quality.

The use of ==> may skew test case distribution. We use collect to see the length of the command sequences, and tabulate to get the frequencies of the individual commands:

What We Do. Our company has been providing elevator services for the Wisconsin market since 1948. We have offered electrical services for that same amount of ...

A special error value. If a property evaluates discard, it causes QuickCheck to discard the current test case. This can be useful if you want to discard the current test case, but are somewhere you can't use ==>, such as inside a generator.

Checks that the values in a given table appear a certain proportion of the time. A call to coverTable table [(x1, p1), ..., (xn, pn)] asserts that of the values in table, x1 should appear at least p1 percent of the time that table appears, x2 at least p2 percent of the time that table appears, and so on.

You don’t need to cancel your direct debit, but can if you wish to. British Gas will be in touch with you about whether your existing direct debit will remain in place, or whether they will set up a new direct debit.

There is a default implementation for function, which you can use if your type has structural equality. Otherwise, you can normally use functionMap or functionShow.

If customers wish to change their tariff or switch supplier, they should ask to be switched to another British Gas tariff, or shop around. You won’t be charged any exit fees. Waiting for them to contact you will be the smoothest way to have any credit balances you had with PfP Energy honoured by British Gas.

Note: for technical reasons, the test case is printed out after the property is tested. To debug a property that goes into an infinite loop, use within to add a timeout instead.