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What is the relationship between UIView's setNeedsLayout, layoutIfNeeded and layoutSubviews?
...ut myself, so take this with some skepticism and forgive me if it contains errors.
setNeedsLayout is an easy one: it just sets a flag somewhere in the UIView that marks it as needing layout. That will force layoutSubviews to be called on the view before the next redraw happens. Note that in many ...
How to pass a user defined argument in scrapy spider
...able to access it outside the __init__ method. Python throws a not defined error. BTW, why have you omitted the super call? PS. I'm working with the CrawlSpider class
– Birla
Sep 24 '14 at 10:57
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What is the “Execute Around” idiom?
... a sandwich’s body to
introduce a new defect, which may lead to silent errors. When the body
code is large and before and after are widely separated, such mistakes
can be hard to detect visually.
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Difference between std::result_of and decltype
...a SFINAE-friendly expression, whereas std::result_of could give you a hard error instead of a deduction failure. That has been corrected in C++14: std::result_of is now required to be SFINAE-friendly (thanks to this paper).
So on a conforming C++14 compiler, std::result_of_t<F(Args...)> is st...
How do you do a ‘Pause’ with PowerShell 2.0?
... I made two slight improvements to the latter: added Test-Path to avoid an error if you use Set-StrictMode (you do, don't you?!) and the final Write-Host to add a newline after your keystroke to put the prompt in the right place.
Function Pause ($Message = "Press any key to continue . . . ") {
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What is this Javascript “require”?
... be able to use it obviously. If you need more information please give the error that you are getting.
– Sam Redway
May 15 '16 at 8:38
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Assert a function/method was not called using Mock
...ent call last):
File "<stdin>", line 1, in <module>
AssertionError: a was called and should not have been
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How to loop over files in directory and change path and add suffix to filename
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I believe there's an error in your code. The one line should be base=${name%.txt}, instead of base=${base%.txt}.
– caseklim
May 15 '14 at 1:16
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Create Pandas DataFrame from a string
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I found (by trial&error) that read_fwf takes more of read_csvs arguments than is documented, but it's true that some have no effect.
– gerrit
Jan 20 at 16:12
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How to add property to a class dynamically?
...ux'])
foo = Foo(bar=13, quux=74)
print foo.bar, foo.quux
foo2 = Foo() # error
If you absolutely need to write your own setter, you'll have to do the metaprogramming at the class level; property() doesn't work on instances.
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