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How to list the size of each file and directory and sort by descending size in Bash?

I found that there is no easy to get way the size of a directory in Bash? 11 Answers 1...
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How can I scale an image in a CSS sprite

In this article, http://css-tricks.com/css-sprites/ , it talks about how can I crop off a smaller image from 1 bigger image. Can you please tell me if it is possible/how I can crop off a smaller image and then scale the cropped off region before I lay it out? ...
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C# how to create a Guid value?

One field of our struct is Guid type. How to generate a valid value for it? 11 Answers ...
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Cost of exception handlers in Python

In another question , the accepted answer suggested replacing a (very cheap) if statement in Python code with a try/except block to improve performance. ...
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How do I convert a float number to a whole number in JavaScript?

I'd like to convert a float to a whole number in JavaScript. Actually, I'd like to know how to do BOTH of the standard conversions: by truncating and by rounding. And efficiently, not via converting to a string and parsing. ...
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Knight's Shortest Path on Chessboard

I've been practicing for an upcoming programming competition and I have stumbled across a question that I am just completely bewildered at. However, I feel as though it's a concept I should learn now rather than cross my fingers that it never comes up. ...
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Get program execution time in the shell

I want to execute something in a linux shell under a few different conditions, and be able to output the execution time of each execution. ...
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Validate phone number with JavaScript

I found this code in some website, and it works perfectly. It validates that the phone number is in one of these formats: (123) 456-7890 or 123-456-7890 ...
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What's the use of do while(0) when we define a macro? [duplicate]

I'm reading the linux kernel and I found many macros like this: 2 Answers 2 ...
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Selecting a row of pandas series/dataframe by integer index

I am curious as to why df[2] is not supported, while df.ix[2] and df[2:3] both work. 6 Answers ...