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How can I define a composite primary key in SQL?
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Just for clarification: a table can have at most one primary key. A primary key consists of one or more columns (from that table). If a primary key consists of two or more columns it is called a composite primary key. It is defined as fol...
How to include “zero” / “0” results in COUNT aggregate?
...e function count() will not count NULL values and thus you'll get a zero.
If you want to learn more about outer joins, here is a nice tutorial: http://sqlzoo.net/wiki/Using_Null
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Border in shape xml
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If you want make a border in a shape xml. You need to use:
For the external border,you need to use:
<stroke/>
For the internal background,you need to use:
<solid/>
If you want to set corners,you need to use...
Inline instantiation of a constant List
...ng>, ReadOnlyCollection<string> or something else is up to you... if you expect that it should only be treated as a sequence, then IEnumerable<string> would probably be most appropriate. If the order matters and you want people to be able to access it by index, IList<T> may be a...
Is there “Break on Exception” in IntelliJ?
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A fast way to pop up the dialog is to press Ctrl + SHIFT + F8 (On Mac: Cmd + SHIFT + F8), then click over to the exception breakpoints tab. If that was the last tab you were viewing, it'll still be selected, making it easy to flick breaking on exceptions on and off.
This will...
Getting current directory in .NET web application
...s nothing to do with the website.
You want HttpRuntime.AppDomainAppPath.
If you're in an HTTP request, you can also call Server.MapPath("~/Whatever").
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Using multiple arguments for string formatting in Python (e.g., '%s … %s')
...s' and I want to know how to seperate the arguments so that they are two different %s. My mind coming from Java came up with this:
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How can I convert byte size into a human-readable format in Java?
...k = 1,000)
public static String humanReadableByteCountSI(long bytes) {
if (-1000 < bytes && bytes < 1000) {
return bytes + " B";
}
CharacterIterator ci = new StringCharacterIterator("kMGTPE");
while (bytes <= -999_950 || bytes >= 999_950) {
bytes /...
Is there a way to suppress JSHint warning for one given line?
...Hint Sublime Text 2/3 plugins to work, you will need to upgrade jshint specifically in the ST package folder. (I specifically ran in to this with JSHint Gutter)
– Josh
Nov 15 '13 at 16:19
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how to “reimport” module to python then code be changed after import
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Note that if you did from foo import * or from foo import bar, the symbol foo doesn't get defined. You need to import sys then reload(sys.modules['foo']) or perhaps reload(sys.modules[bar.__module__])
– drevicko
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