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How can I escape white space in a bash loop list?
...though this requires that your find support -print0:
# this is safe
while IFS= read -r -d '' n; do
printf '%q\n' "$n"
done < <(find test -mindepth 1 -type d -print0)
You can also populate an array from find, and pass that array later:
# this is safe
declare -a myarray
while IFS= read -r ...
Flatten an irregular list of lists
...boost the performance.
Python 2
def flatten(l):
for el in l:
if isinstance(el, collections.Iterable) and not isinstance(el, basestring):
for sub in flatten(el):
yield sub
else:
yield el
I used the Iterable ABC added in 2.6.
Python 3
I...
Get contentEditable caret index position
...s
The editable div does not have the CSS white-space property set to pre
If you need a more general approach that will work content with nested elements, try this answer:
https://stackoverflow.com/a/4812022/96100
Code:
function getCaretPosition(editableDiv) {
var caretPos = 0,
sel, ...
Get decimal portion of a number with JavaScript
...
(2.3 % 1).toFixed(4).substring(2) = "3000" if you need it without the 0.
– Simon_Weaver
Oct 2 '15 at 9:22
15
...
Format number to always show 2 decimal places
...'s returning a string...So this method is really only useful for display. If you want to perform further mathematical computations on the rounded value do not use toFixed().
– TWright
Oct 15 '15 at 7:19
...
How do you split a list into evenly sized chunks?
...59],
[60, 61, 62, 63, 64, 65, 66, 67, 68, 69],
[70, 71, 72, 73, 74]]
If you're using Python 2, you should use xrange() instead of range():
def chunks(lst, n):
"""Yield successive n-sized chunks from lst."""
for i in xrange(0, len(lst), n):
yield lst[i:i + n]
Also you can s...
How do I manage MongoDB connections in a Node.js web application?
...
@Cracker: If you have express application, you can save db object into req.db with this middleware: github.com/floatdrop/express-mongo-db
– floatdrop
Aug 8 '14 at 18:15
...
COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
...
Use either COUNT(field) or COUNT(*), and stick with it consistently, and if your database allows COUNT(tableHere) or COUNT(tableHere.*), use that.
In short, don't use COUNT(1) for anything. It's a one-trick pony, which rarely does what you want, and in those rare cases is equivalent to count(*)...
How to disable Crashlytics during development
...ys to disable Crashlytics while you are doing your debug builds!
Use a different android:versionString for debug and release builds and then disable crash reporting from the Crashlytics web dashboard for the debug version.
Wrap the call to Crashlytics.start() in an if statement that checks a debu...
Checking if all elements in a list are unique
...
Not the most efficient, but straight forward and concise:
if len(x) > len(set(x)):
pass # do something
Probably won't make much of a difference for short lists.
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