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What is the 'pythonic' equivalent to the 'fold' function from functional programming?
...sum. For other purposes, you can sometimes use some combination of reduce (from the functools module) and the operator module, e.g.:
def product(xs):
return reduce(operator.mul, xs, 1)
Be aware that reduce is actually a foldl, in Haskell terms. There is no special syntax to perform folds, the...
Checkout another branch when there are uncommitted changes on the current branch
...y means "Commit all the changes, but on no branch at all, then remove them from where I am now." That makes it possible to switch: you now have no in-progress changes. You can then git stash apply them after switching.
Sidebar: git stash save is the old syntax; git stash push was introduced in...
What is the meaning of single and double underscore before an object name?
...PEP-8:
_single_leading_underscore: weak "internal use" indicator. E.g. from M import * does not import objects whose name starts with an underscore.
Double Underscore (Name Mangling)
From the Python docs:
Any identifier of the form __spam (at least two leading underscores, at most one tra...
Log all requests from the python-requests module
...
@TD_Nijboer: see How do I disable log messages from the Requests library?
– Martijn Pieters♦
Aug 11 '16 at 13:46
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Swift native base class or NSObject
...n include or omit a superclass as needed.
Note that omitting a superclass from the class declaration, doesn't assign a implicit base superclass of any kind. It defines a base class, which will effectively become the root for an independent class hierarchy.
From the language reference:
Swift cl...
Difference between android-support-v7-appcompat and android-support-v4
...roid 4.0 (API level 14) for most library packages.
Below is difference from Support Library Packages:
v4 Support Library
This library is designed to be used with Android 1.6 (API level 4) Android 2.3 (API level 9) Android 4.0 (API level 14) and higher. It includes the largest set of API...
Removing whitespace from strings in Java
...
Just use StringUtils from apache-commons. Its a static method called StringUtils.deleteWhitespace.
– Crozeta
Jun 7 '17 at 13:48
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Fatal error: use of unimplemented initializer 'init(coder:)' for class
...ntroller. That method is required because instantiating a UIViewController from a UIStoryboard calls it.
To see how we initialize a UIViewController from a UIStoryboard, please take a look here
Why is this not a problem with Objective-C?
Because Objective-C automatically inherits all the required UI...
What's the meaning of “=>” (an arrow formed from equals & greater than) in JavaScript?
...below).
You can read more in the Mozilla documentation on arrow functions.
From the Mozilla documentation:
An arrow function expression (also known as fat arrow function) has a shorter syntax compared to function expressions and lexically binds the this value (does not bind its own this, arguments,...
How to save and load cookies using Python + Selenium WebDriver
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When you need cookies from session to session there is another way to do it, use the Chrome options user-data-dir in order to use folders as profiles, I run:
chrome_options = Options()
chrome_options.add_argument("user-data-dir=selenium")
driver...