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How to check if a list is empty in Python? [duplicate]
...l performance pessimisation: do not spend time counting elements of potentially long collections, if all you need to know is if they are empty.
– Ad N
Aug 12 '15 at 12:38
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Determining the path that a yum package installed to [closed]
I've installed ffmpeg using yum under Redhat, and I'm having difficulty figuring out where (what path) it installed the package to. Is there an easy way of determining this without resorting to finding it myself manually?
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Stop on first error [duplicate]
...ve bash stop on the first command failure, without putting stuff like this all through my code?
1 Answer
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How can I count the number of children?
....length;
The find() method traverses DOM downwards along descendants, all the way down to the last descendant.
Note: children() method traverses a single level down the DOM tree.
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Can we have multiline comments in a Java properties file?
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If you use Eclipse, you can select multiple lines and comment all with a shortcut (Ctrl+/ by default). Same shortcut uncomments the lines, but you have to pay attention no to select any empty line, which will cause the non-empty ones to get commented more than once.
These apply to Ecli...
Lock screen orientation (Android) [duplicate]
... android:configChanges=... line prevents onResume(), onPause() from being called when the screen is rotated. Without this line, the rotation will stay as you requested but the calls will still be made.
Note: keyboardHidden and orientation are required for < Android 3.2 (API level 13), and all th...
load external css file in body tag [duplicate]
usually, external css file loading code is put on header of html.
1 Answer
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Javascript Regexp dynamic generation from variables? [duplicate]
...gExp(pattern1+'|'+pattern2, 'gi'));
When I'm concatenating strings, all slashes are gone.
If you have a backslash in your pattern to escape a special regex character, (like \(), you have to use two backslashes in the string (because \ is the escape character in a string): new RegExp('\\(') ...
Using :before and :after CSS selector to insert Html [duplicate]
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@Foxinni the more significant reason for not allowing html inside the content parameter is the fact that CSS is designed to work in a single pass-through of the page. If there were html, that would need to be styled, which means the css would need to come back and proc...
View a specific Git commit [duplicate]
... Is there a way to see the log notes of just that commit, using the hash? All the docs talk about how to look at the whole tree.
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