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Why can't I use an alias in a DELETE statement?
...bo.foods AS f WHERE f.name IN (...);
I fail to see the point of aliasing for this specific DELETE statement, especially since (at least IIRC) this no longer conforms to strict ANSI. But yes, as comments suggest, it may be necessary for other query forms (eg correlation).
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Difference between 'self' and 'total' in Chrome CPU Profile of JS
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Self Time: For a function, is the amount of time to execute code within the function (inline statements).
Checking the performance of individual functions is known as bottom-up analysis.
Total Time: For a function, is the self time of...
Is there a way to change context to iframe in javascript console?
...ecute code in <iframe>s by using the window.frames[x] functionality. For example,
window.frames[0].runFunction()
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How to Set Focus on Input Field using JQuery
... Yes, you can write it either way. I suppose input:first might be the more formal way to write it, although it seems easier to read the other way. But maybe that's just me :)
– Justin Ethier
Jul 18 '11 at 20:17
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what is the most efficient way of counting occurrences in pandas?
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Thanks. I also found this useful for speeding up counting a specific value in a series. e.g. df.word.value_counts()['myword'] is about twice as fast as len(df[df.word == 'myword']).
– fantabolous
Mar 10 '15 at 13:35
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Python Regex instantly replace groups
...obably better achieved by using this syntax:
r"\g<1> \g<2>"
for the replacement string. This way, you work around syntax limitations where a group may be followed by a digit. Again, this is all present in the doc, nothing new, just sometimes difficult to spot at first sight.
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What is the difference between git am and git apply?
... index, if --index or --cached is used).
git am takes a mailbox of commits formatted as an email messages (e.g. the output of git format-patch) and applies them to the current branch.
git am uses git apply behind the scenes, but does more work before (reading a Maildir or mbox, and parsing email m...
How to execute ipdb.set_trace() at will while running pytest tests
I'm using pytest for my test suite. While catching bugs in complex inter-components test, I would like to place import ipdb; ipdb.set_trace() in the middle of my code to allow me to debug it.
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Initialize a long in Java
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Just in case someone was wondering: the same goes for hex, e.g. 0x200000000L
– user149408
Jun 4 '17 at 14:33
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CSS: transition opacity on mouse-out?
...ect the mouse-over event, but only mouse-out, you can turn transitions off for the :hover state :
.item:hover {
-webkit-transition: none;
-moz-transition: none;
-ms-transition: none;
-o-transition: none;
transition: none;
zoom: 1;
filter: alpha(opacity=50);
opacity: 0.5;
}
Demo: h...