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LINQ Ring: Any() vs Contains() for Huge Collections
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Contains is also an extension method against IEnumerable<T> (although some collections have their own Contains instance method too). As you say, Any is more flexible than Contains because you can pass it a custom predicate, but Contains might be slightly faster because it doe...
How to interpolate variables in strings in JavaScript, without concatenation?
...}.`);
// "Fifteen is 15.
How neat is that?
Bonus:
It also allows for multi-line strings in javascript without escaping, which is great for templates:
return `
<div class="${foo}">
...
</div>
`;
Browser support:
As this syntax is not supported by older browsers (m...
case-insensitive list sorting, without lowercasing the result?
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This works in Python 3 and does not involves lowercasing the result (!).
values.sort(key=str.lower)
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Using unset vs. setting a variable to empty
...oo:bar}. test for yourself: unset a; echo ">${a:-foo}-${a:foo}-${a-foo}<"
– Liviu Chircu
Jun 24 '17 at 13:05
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Counting the number of True Booleans in a Python List
...luate as True as well. A more robust solution would be to use the bool builtin:
>>> l = [1, 2, True, False]
>>> sum(bool(x) for x in l)
3
UPDATE: Here's another similarly robust solution that has the advantage of being more transparent:
>>> sum(1 for x in l if x)
3
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How to load program reading stdin and taking parameters in gdb?
...om a shell you'd do it like this:
% gdb myprogram
gdb> run params ... < input.txt
This seems to work within emacs too.
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How does zip(*[iter(s)]*n) work in Python?
...3) #[1,2,3]
[3:6) #[4,5,6]
[6:9) #[7,8,9]
FWIW, you can get the same result with map() with an initial argument of None:
>>> map(None,*[iter(s)]*3)
[(1, 2, 3), (4, 5, 6), (7, 8, 9)]
For more on zip() and map(): http://muffinresearch.co.uk/archives/2007/10/16/python-transposing-lists-w...
How do I update a GitHub forked repository?
...is supposed to support distributed collaboration, then why is it so difficult to perform a basic workflow? 4 million people and 2200 upvotes mean the tool failed. "you can add the original GitHub repository as a "remote" - Why does one even have to do this? Why is it not done during the fork? What i...
Meaning of Git checkout double dashes
...s the documentation explain what it does or why it's used...which is what ultimately brought me here.
– chris
May 24 '16 at 18:21
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Checking if an instance's class implements an interface?
...f it implements a particular interface? As far as I know, there isn't a built-in function to do this directly. What options do I have (if any)?
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