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How to add leading zeros for for-loop in shell? [duplicate]
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Use the following syntax:
$ for i in {01..05}; do echo "$i"; done
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02
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05
Disclaimer: Leading zeros only work in >=bash-4.
If you want to use printf, nothing prevents you from putting its result in a variable for further use:
$ foo=$(pri...
Why would iterating over a List be faster than indexing through it?
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In a linked list, each element has a pointer to the next element:
head -> item1 -> item2 -> item3 -> etc.
To access item3, you can see clearly that you need to walk from the head through every node until you reach item3, since you cannot jump directly.
Thus, if I...
gcc makefile error: “No rule to make target …”
I'm trying to use GCC (linux) with a makefile to compile my project.
17 Answers
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A potentially dangerous Request.Path value was detected from the client (*)
I am receiving the rather self explanatory error:
8 Answers
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What does the NS prefix mean?
Many classes in Cocoa/Cocoa Touch have the NS prefix. What does it mean?
9 Answers
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How to obtain a Thread id in Python?
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Also note that at least in Python 2.5 and 2.6 on OS X, there seems to be a bug where threading.current_thread().ident is inappropriately None. Probably makes sense just to use thread.get_ident() in Python 2 and threading.current_thread().ident in Python 3.
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Making the main scrollbar always visible
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I think Internet Explorer 6.x+, Firefox 1.5+ if I remember correctly. I've been using the above code and it works in FF1.5-3.5.1 and IE6-8 for me.
– Corv1nus
Jul 29 '09 at 19:43
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How to allow to accept only image files?
...he following code:
<input type="file" name="myImage" accept="image/x-png,image/gif,image/jpeg" />
Or simply:
<input type="file" name="myImage" accept="image/*" />
Note that this only provides a hint to the browser as to what file-types to display to the user, but ...
Changing specific text's color using NSMutableAttributedString in Swift
The issue I am having is that I want to be able to change the textColor of certain text in a TextView. I am using a concatenated string, and just want the strings I am appending into the TextView's text. It appears that what I want to use is NSMutableAttributedString , but I am not finding any reso...
Convert line-endings for whole directory tree (Git)
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dos2unix does that for you. Fairly straight forward process.
dos2unix filename
Thanks to toolbear, here is a one-liner that recursively replaces line endings and properly handles whitespace, quotes, and shell meta chars.
find . -...