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How to show line number when executing bash script
...ill rather difficult for me to locate which line did the execution stop in order to locate the problem.
Is there a method which can output the line number of the script before each line is executed?
Or output the line number before the command exhibition generated by set -x ?
Or any method which ca...
Python Script execute commands in Terminal
...ything. It's way safer. subprocess.call() will get you a nice interface in order to replace the simple call form.
– Jorge Vargas
Mar 24 '11 at 20:35
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How many files can I put in a directory?
... We have hundreds of thousands of images in our social network website. In order to improve the performance we were forced to have 100 (or 1000 for some files) sub directories and distribute the files into them (ext3 on linux+ Apache for us).
– wmac
Jul 24 '14 ...
Full-screen iframe with a height of 100%
...er) that the iframe's parent has a height. And its parent. And its parent. Etc:
html, body { height: 100%; }
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How do I remove a substring from the end of a string in Python?
...; the regex one would involve some performance penalty (parsing the regex, etc.). I wouldn't go with the rsplit() one, but that's because I don't know what you're exactly trying to achieve. I figure it's removing the .com if and only if it appears at the end of the url? The rsplit solution would giv...
How to add default value for html ? [closed]
...ute, and only works for <input> tags, ie, <input type='text'>, etc. I don't know why the creators of HTML5 decided not to incorporate that, but that's the way it is for now.
The best method for inserting text into <textarea> elements has been outlined correctly here as: <textare...
Node.js create folder or use existing
...an achieve this very gracefully without encountering a race condition.
In order to prevent dead time between checking for existence and creating the directory, we simply try to create it straight up, and disregard the error if it is EEXIST (directory already exists).
If the error is not EEXIST, ho...
How to avoid having class data shared among instances?
... "list" as a "class level property" and not "instance level property". In order to have properties scoped at the instance level, you need to initialize them through referencing with the "self" parameter in the __init__ method (or elsewhere depending on the situation).
You don't strictly have to in...
What does |= (single pipe equal) and &=(single ampersand equal) mean
... b is equivalent to a = a & b except that a is evaluated only once
In order to remove the System bit without changing other bits, use
Folder.Attributes &= ~FileAttributes.System;
~ is bitwise negation. You will thus set all bits to 1 except the System bit. and-ing it with the mask will s...
mysqli_fetch_assoc() expects parameter / Call to a member function bind_param() errors. How to get t
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