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How to extract the first two characters of a string in shell scripting?

...er expansion: pax> long="USCAGol.blah.blah.blah" pax> short="${long:0:2}" ; echo "${short}" US This will set short to be the first two characters of long. If long is shorter than two characters, short will be identical to it. This in-shell method is usually better if you're going to be doi...
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How to erase the file contents of text file in Python?

...if you have already an opened file: f = open('file.txt', 'r+') f.truncate(0) # need '0' when using r+ In C++, you could use something similar. share | improve this answer | ...
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correct way to use super (argument passing)

... 107 Sometimes two classes may have some parameter names in common. In that case, you can't pop the ...
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How to Create a circular progressbar in Android which rotates on it?

...le file (@drawable folder): circular_progress_bar.xml <?xml version="1.0" encoding="utf-8"?> <rotate xmlns:android="http://schemas.android.com/apk/res/android" android:fromDegrees="270" android:toDegrees="270"> <shape android:innerRadiusRatio="2.5" android...
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Is there an XSLT name-of element?

... | edited Feb 25 '09 at 9:22 Robert Gould 64.3k5757 gold badges174174 silver badges267267 bronze badges ...
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What is offsetHeight, clientHeight, scrollHeight?

... | edited Apr 26 '16 at 20:25 answered Mar 26 '14 at 23:55 ...
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Update parent scope variable in AngularJS

...= "this WILL modify the parent"; }); Working demo: http://jsfiddle.net/sh0ber/xxNxj/ See What are the nuances of scope prototypal / prototypical inheritance in AngularJS? share | improve this ans...
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Difference between class and type

... | edited Dec 30 '16 at 15:13 SOFe 6,87644 gold badges2727 silver badges5454 bronze badges an...
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How to install grunt and how to build script with it

...| edited Mar 17 '14 at 15:05 Tomalak 294k6060 gold badges474474 silver badges577577 bronze badges answer...
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Is is possible to check if an object is already attached to a data context in Entity Framework?

... answered Nov 11 '09 at 15:54 joshcomleyjoshcomley 25.3k2121 gold badges9999 silver badges138138 bronze badges ...