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What is the use of “assert” in Python?
...s early in your program, where the cause is clear, rather than later as a side-effect of some other operation.
When you do...
assert condition
... you're telling the program to test that condition, and immediately trigger an error if the condition is false.
In Python, it's roughly equivalent to...
How do I test if a string is empty in Objective-C?
...
You can check if [string length] == 0. This will check if it's a valid but empty string (@"") as well as if it's nil, since calling length on nil will also return 0.
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How do you access command line arguments in Swift?
...rary for doing just this:
We’re delighted to announce ArgumentParser, a new open-source library that makes it straightforward — even enjoyable! — to parse command-line arguments in Swift.
https://swift.org/blog/argument-parser/
Swift Argument Parser
https://github.com/apple/swift-argument-p...
Variable name as a string in Javascript
... Great answer!! This particular use of object destructing is new to me (line 2 let nameObject = {myVar} so useful! It doesn't seem to be documented anywhere. Got any links?
– Laurence Lord
Dec 19 '18 at 9:45
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jquery: $(window).scrollTop() but no $(window).scrollBottom()
... answered Jan 11 '11 at 7:47
David TangDavid Tang
84.3k2828 gold badges156156 silver badges144144 bronze badges
...
Convert a string representation of a hex dump to a byte array using Java?
...xStringToByteArray(String s) {
int len = s.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
+ Character.digit(s.charAt(i+1), 16));
}
return dat...
Escape quotes in JavaScript
...it's an HTML/XML encoding issue: you can't have double-quote characters inside an attributes value w/o escaping them... otherwise browsers/parsers think you're ending the attribute value declaration.
– Aaron
Aug 21 '10 at 7:09
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C++ convert vector to vector
...l = function(e) {
var $elem = $('.new-login-left'),
docViewTop = $window.scrollTop(),
docViewBottom = docViewTop + $window.height(),
...
css3 drop shadow under another div, z-index not working [duplicate]
...ook like one div (the header) is "above" another. my problem is that the "middle" div is covering the drop shadow. i tried using z-index to put the header div about the middle div, but it's not working (the shadow is still being covered). when i put a break between the divs, i can see the shadow and...
jQuery: outer html() [duplicate]
...answered Apr 21 '11 at 12:41
David TangDavid Tang
84.3k2828 gold badges156156 silver badges144144 bronze badges
...