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SQL: How to properly check if a record exists
...e between COUNT(*) and COUNT(column name):
COUNT(*) will count all rows, including nulls
COUNT(column name) will only count non null occurrences of column name
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JavaScript regex multiline flag doesn't work
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According to MDN, [^] also works to match any character, including newlines, in JavaScript. See developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…
– Dan Allen
Aug 4 '14 at 9:20
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What are the special dollar sign shell variables?
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Take care with some of the examples; $0 may include some leading path as well as the name of the program. Eg save this two line script as ./mytry.sh and the execute it.
#!/bin/bash
echo "parameter 0 --> $0" ; exit 0
Output:
parameter 0 --> ./mytry.sh
This ...
How to create a table from select query result in SQL Server 2008 [duplicate]
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Is it more efficient to copy a vector by reserving and copying, or by creating and swapping? [duplic
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How to build & install GLFW 3 and use it in a Linux project
...ges, telling you what has been built or where it has been placed. (In /usr/include, for example.)
Step 2: Create a test program and compile
The next step is to fire up vim ("what?! vim?!" you say) or your preferred IDE / text editor... I didn't use vim, I used Kate, because I am on KUbuntu 13.04... ...
How to style the parent element when hovering a child element?
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When to use CouchDB over MongoDB and vice versa
... Good info for the time, but this is really old... lots has changed (including REST interfaces for Mongo).
– rICh
Oct 12 '14 at 23:24
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