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How to randomize (shuffle) a JavaScript array?
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var arr = [2, 11, 37, 42];
shuffle(arr);
console.log(arr);
Some more info about the algorithm used.
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Undo working copy modifications of one file in Git?
...HEAD^^^ for 3 commits back. You can also use HEAD~2, or HEAD~3, which gets more convenient if you want to go more commits back, while HEAD^2 means "the second parent of this commit"; because of merge commits, a commit can have more than one previous commit, so with HEAD^ a number selects which of th...
What is the Python equivalent of Matlab's tic and toc functions?
...f'):
# do some foo
# do some stuff
Sometimes I find this technique more convenient than timeit - it all depends on what you want to measure.
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What are “named tuples” in Python?
...((pt1[0]-pt2[0])**2 + (pt1[1]-pt2[1])**2)
Using a named tuple it becomes more readable:
from collections import namedtuple
Point = namedtuple('Point', 'x y')
pt1 = Point(1.0, 5.0)
pt2 = Point(2.5, 1.5)
from math import sqrt
line_length = sqrt((pt1.x-pt2.x)**2 + (pt1.y-pt2.y)**2)
However, named...
How to print to stderr in Python?
...NOW, just to print some debugging info to the stderr... which I would find more of a hassle in most situations when I'm trying to debug something. (I'd rather not introduce new syntax errors!) :-)
– Dan H
Nov 20 '14 at 14:49
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Boolean method naming readability
...xists(...)
Would be my prefered. As it makes your conditional checks far more like natural english:
if userExists ...
But I guess there is no hard and fast rule - just be consistent
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How to add extra info to copied web text
...ent.addEventListener('copy', (event) => {
const pagelink = `\n\nRead more at: ${document.location.href}`;
event.clipboardData.setData('text', document.getSelection() + pagelink);
event.preventDefault();
});
Lorem ipsum dolor sit amet, consectetur adipiscing elit.<br/>
<textar...
Show which git tag you are on?
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Edit: Jakub Narębski has more git-fu. The following much simpler command works perfectly:
git describe --tags
(Or without the --tags if you have checked out an annotated tag. My tag is lightweight, so I need the --tags.)
original answer follows:
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Hidden Features of PHP? [closed]
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Documentation. The documentation gets my vote. I haven't encountered a more thorough online documentation for a programming language - everything else I have to piece together from various websites and man pages.
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How do I expand the output display to see more columns of a pandas DataFrame?
...o a console.
The default is 1,000,000 rows. So, if a DataFrame has more
1,000,000 rows there will be no null check performed on the
columns and thus the representation will take much less time to
display in an interactive session. A value of None means always
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