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Local variables in nested functions
...ets the cat.
dog: Mary pets the cat.
cat: Mary pets the cat.
But if we avoid creating a list() first:
>>> for name, f in get_petters():
... print(name + ":", f())
cow: Mary pets the cow.
dog: Mary pets the dog.
cat: Mary pets the cat.
What's going on? Why does this subtle difference ...
__lt__ instead of __cmp__
...parison operators" such as __lt__ . The rich comparison overloads are said to be preferred, but why is this so?
5 Answer...
Composer: how can I install another dependency without updating old ones?
... (> or * chars after the colons) found in composer.json! This can be avoided by using composer update vendor/package, but I wouldn't recommend making a habit of it, as you're one forgotten argument away from a potentially broken project…
Keep things sane and stick with composer require vendor/...
What's the difference between using CGFloat and float?
...t, including the kernel and user applications. Apple's 64-bit Transition Guide for Cocoa is a useful resource.
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What does the 'standalone' directive mean in XML?
...nore any markup declarations in the DTD. The DTD is thereafter used for validation only.
As an example, consider the humble <img> tag. If you look at the XHTML 1.0 DTD, you see a markup declaration telling the parser that <img> tags must be EMPTY and possess src and alt attributes. When...
Isn't it silly that a tiny favicon requires yet another HTTP request? How can I put the favicon into
...owsers can handle SVG Favicons:
Chrome
Firefox
Edge
Opera
Chrome for Android
KaiOS Browser
Note that these browsers still can't:
Safari
iOS Safari
Firefox for Android
With the above in mind, we can now use SVG Favicons with a reasonable degree of confidence.
2) Present the SVG as a Data URI
The...
When should Flask.g be used?
... which setup the environment for the request, and should not be handled inside before_request and after_request)
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What is NODE_ENV and how to use it in Express?
...t defaults to "development", which may result in development code being accidentally run in a production environment - it's much safer if your app throws an error if this important value is not set (or if preferred, defaults to production logic as above).
Be aware that if you haven't explicitly set ...
Sanitizing strings to make them URL and filename safe?
...decoding input and output in your application.
The Encoder interface provides:
canonicalize (string $input, [bool $strict = true])
decodeFromBase64 (string $input)
decodeFromURL (string $input)
encodeForBase64 (string $input, [bool $wrap = false])
encodeForCSS (string $input)
encodeForHTML (strin...
Who is “us” and who is “them” according to Git?
...ture_branch onto the latest master. Therefore, "us" = HEAD, but since git did a new checkout behind-the-scenes to perform this rebase, HEAD is NOT the branch you were on when you typed git rebase master. Instead, us, or HEAD, is some merge-base commit at which point a conflict occurred, and them is ...