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Django select only rows with duplicate field values
suppose we have a model in django defined as follows:
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Can JSON start with “[”?
From what I can read on json.org , all JSON strings should start with { (curly brace), and [ characters (square brackets) represent an array element in JSON.
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How do you delete all text above a certain line
How do you delete all text above a certain line. For deletion below a line I use "d shift g"
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JavaScript :How to set a Conditional Break Point in Chrome debugger tools
I have this simple a js file , which prints date continosly .
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How to extract the first two characters of a string in shell scripting?
For example, given:
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How to expand/collapse a diff sections in Vimdiff?
I've started using vimdiff today, and wanted to do some of the things that I've taken for granted on Windows based diff editors (like expand/collapse a diff section, have full file expansion/only diffs with 3 context lines above or below, etc.). I currently know only the following commands :
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Testing javascript with Mocha - how can I use console.log to debug a test?
I am using the javascript test-runner "Mocha".
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Entity Framework and Connection Pooling
I've recently started to use the Entity Framework 4.0 in my .NET 4.0 application and am curious about a few things relating to pooling.
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What does -fPIC mean when building a shared library?
I know the ' -fPIC ' option has something to do with resolving addresses and independence between individual modules, but I'm not sure what it really means. Can you explain?
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Get the client IP address using PHP [duplicate]
I want to get the client IP address who uses my website. I am using the PHP $_SERVER superglobal:
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