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How to profile a bash shell script slow startup?
...t to go to the file command.txt leaving stdout and stdout to be output normally (or be redirected separately).
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Multiple aggregations of the same column using pandas GroupBy.agg()
... functions f1, f2 to the same column df["returns"] , without having to call agg() multiple times?
3 Answers
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What does mysql error 1025 (HY000): Error on rename of './foo' (errorno: 150) mean?
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You usually get this error if your tables use the InnoDB engine. In that case you would have to drop the foreign key, and then do the alter table and drop the column.
But the tricky part is that you can't drop the foreign key using...
Vertical (rotated) label in Android
...d simple vertical text implementation, extending TextView. This means that all standard styles of TextView may be used, because it is extended TextView.
public class VerticalTextView extends TextView{
final boolean topDown;
public VerticalTextView(Context context, AttributeSet attrs){
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Getting key with maximum value in dictionary?
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You can use operator.itemgetter for that:
import operator
stats = {'a':1000, 'b':3000, 'c': 100}
max(stats.iteritems(), key=operator.itemgetter(1))[0]
And instead of building a new list in memory use stats.iteritems(). The key parameter to the max() function is a function that computes a key t...
Objective-C Static Class Level variables
...within classA.m?
– goatlinks
Jan 8 '10 at 7:52
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this might be a silly question but what about th...
Remove all special characters, punctuation and spaces from string
I need to remove all special characters, punctuation and spaces from a string so that I only have letters and numbers.
16 A...
Run a callback only if an attribute has changed in Rails
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10
Try this
after_validation :do_something, if: ->(obj){ obj.status_id.present? and obj.status...
MLKitTranslator 拓展：离线翻译 · App Inventor 2 中文网
...; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } /*手机版：反馈浮动按钮收小*/ @media screen and (max-width: 700px) { .feedback-pop { font-size: 13px; line-height: 14px; padding: 10px 7px; } .feedback-pop .feedback-img { width: 2...
Why is extending native objects a bad practice?
...ody does it "the wrong way", and adds enumerable types to Object , practically destroying all loops on any object?
8 Answe...