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How to set specific java version to Maven
...ml file to my ~/.m2/ folder with following content:
<toolchains xmlns="http://maven.apache.org/TOOLCHAINS/1.1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/TOOLCHAINS/1.1.0 http://maven.apache.org/xsd/toolchains-1.1.0.xsd">
<!-- JDK ...
Instance attribute attribute_name defined outside __init__
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How is the undo tree used in Vim?
...igured I'd mention that I wrote an undo tree visualization plugin for Vim: http://bitbucket.org/sjl/gundo.vim/
Personally I found that graphing the tree like this was the only way I could make sense of it.
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How to remove array element in mongodb?
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Forward an invocation of a variadic function in C
...a va_list instead of a variable number of arguments, you can't do it. See http://c-faq.com/varargs/handoff.html.
Example:
void myfun(const char *fmt, va_list argp) {
vfprintf(stderr, fmt, argp);
}
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Save classifier to disk in scikit-learn
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MongoDB atomic “findOrCreate”: findOne, insert if nonexistent, but do not update
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How do you get a query string on Flask?
...he full documentation for the request and response objects is in Werkzeug: http://werkzeug.pocoo.org/docs/wrappers/
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New Array from Index Range Swift
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How do I make a textbox that only accepts numbers?
...alidating events were designed for.
Here's the MSDN article on the topic: http://msdn.microsoft.com/en-us/library/system.windows.forms.control.validating.aspx
The TL;DR version: check the .Text property in the Validating event and set e.Cancel=True when the data is invalid.
When you set e.Cancel=...