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Check if a table exists in Rails
...ore than 20 engineers on a website so I want to make sure they have migrated the table before they can do a rake task which will populate that respective table.
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Fastest way to convert Image to Byte array
I am making Remote Desktop sharing application in which I capture an image of the Desktop and Compress it and Send it to the receiver. To compress the image I need to convert it to a byte[].
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What kind of leaks does automatic reference counting in Objective-C not prevent or minimize?
In the Mac and iOS platforms, memory leaks are often caused by unreleased pointers. Traditionally, it has always been of utmost importance to check your allocs, copies and retains to make sure each has a corresponding release message.
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Is $(document).ready necessary?
I saw this question in stackoverflow but do not feel that it was answered at all.
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@Media min-width & max-width
I have this @media setup:
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.NET HttpClient. How to POST string value?
How can I create using C# and HttpClient the following POST request:
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EC2 instance types's exact network performance?
I cannot find exact network performance details for different EC2 instance types on Amazon. Instead, they are only saying:
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How can I get the executing assembly version?
...ying to get the executing assembly version in C# 3.0 using the following code:
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What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)
I just want to understand following line of code in shell. It is used to get the current working directory. I am aware that $(variable) name return the value inside the variable name, but what is $(command) supposed to return? Does it return the value after executing the command? In that case, w...
What are “res” and “req” parameters in Express functions?
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