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PHP foreach change original array values

I am very new in multi dimensional arrays, and this is bugging me big time. 5 Answers ...
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MySQL: Invalid use of group function

I am using MySQL. Here is my schema: 2 Answers 2 ...
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Convert unix time to readable date in pandas dataframe

I have a dataframe with unix times and prices in it. I want to convert the index column so that it shows in human readable dates. ...
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Hide all but $(this) via :not in jQuery selector

Advanced title, simple question: 4 Answers 4 ...
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How to create a zip file in Java

I have a dynamic text file that picks content from a database according to the user's query. I have to write this content into a text file and zip it in a folder in a servlet. How should I do this? ...
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Breaking up long strings on multiple lines in Ruby without stripping newlines

We recently decided at my job to a ruby style guide. One of the edicts is that no line should be wider than 80 characters. Since this is a Rails project, we often have strings that are a little bit longer - i.e. " User X wanted to send you a message about Thing Y " that doesn't always fit within the...
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Redefining NULL

I'm writing C code for a system where address 0x0000 is valid and contains port I/O. Therefore, any possible bugs that access a NULL pointer will remain undetected and at the same time cause dangerous behaviour. ...
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Why can I use auto on a private type?

I was somehow surprised that the following code compiles and runs (vc2012 & gcc4.7.2) 4 Answers ...
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Simple logical operators in Bash

I have a couple of variables and I want to check the following condition (written out in words, then my failed attempt at bash scripting): ...
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jQuery - Detect value change on hidden input field

I have a hidden text field whose value gets updated via an AJAX response. 8 Answers 8 ...