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Return 0 if field is null in MySQL
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Use IFNULL:
IFNULL(expr1, 0)
From the documentation:
If expr1 is not NULL, IFNULL() returns expr1; otherwise it returns expr2. IFNULL() returns a numeric or string value, depending on the context in which it is used.
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Random date in C#
...ng for some succinct, modern C# code to generate a random date between Jan 1 1995 and the current date.
7 Answers
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Two statements next to curly brace in an equation
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185
You can try the cases env in amsmath.
\documentclass{article}
\usepackage{amsmath}
\begin{do...
How to create circle with Bézier curves?
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10 Answers
10
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How do I write a “tab” in Python?
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158
This is the code:
f = open(filename, 'w')
f.write("hello\talex")
The \t inside the string i...
Understanding how recursive functions work
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18 Answers
18
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add a string prefix to each value in a string column using Pandas
...gt;>> df = pd.DataFrame({'col':['a',0]})
>>> df
col
0 a
1 0
>>> df['col'] = 'str' + df['col'].astype(str)
>>> df
col
0 stra
1 str0
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How to avoid scientific notation for large numbers in JavaScript?
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115
There's Number.toFixed, but it uses scientific notation if the number is >= 1e21 and has a ...
How to access cookies in AngularJS?
...}</pre>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.19/angular.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.19/angular-cookies.js"></script>
<script>
angular.module('myApp', ['ngCookies']);
app.controller('...
How to add a new audio (not mixing) into a video using ffmpeg?
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Replace audio
ffmpeg -i video.mp4 -i audio.wav -map 0:v -map 1:a -c:v copy -shortest output.mp4
The -map option allows you to manually select streams / tracks. See FFmpeg Wiki: Map for more info.
This example uses -c:v copy to stream copy (mux) the video. No re-encoding of the video ...