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JavaScript check if variable exists (is defined/initialized)
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3153
You want the typeof operator. Specifically:
if (typeof variable !== 'undefined') {
// th...
Trying to embed newline in a variable in bash [duplicate]
..."
p=$( embed_newline $var ) # Do not use double quotes "$var"
echo "$p"
3. Using $'\n' (less portable)
bash and zsh interprets $'\n' as a new line.
var="a b c"
for i in $var
do
p="$p"$'\n'"$i"
done
echo "$p" # Double quotes required
# But -e not required
Avoid extra leading newli...
How to call multiple JavaScript functions in onclick event?
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403
onclick="doSomething();doSomethingElse();"
But really, you're better off not using onclick at ...
那些年 O2O创业我踩了十个坑 - 资讯 - 清泛网 - 专注C/C++及内核技术
...口猪。
2、强烈认为洗衣是仅次于吃饭的高频、刚需。
3、认为存在数十年的线下洗衣店模式存在诸多痛点：比如无法提供24小时服务、标准化程度低、洗涤质量无保障、大多为加盟店缺乏管理、售后无保障。
在O2O风口来临之...
Colorized Ruby output to the terminal [closed]
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383
Colorize is my favorite gem! :-)
Check it out:
https://github.com/fazibear/colorize
Insta...
How to get datetime in JavaScript?
How to get date time in JavaScript with format 31/12/2010 03:55 AM?
7 Answers
7
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How to replace four spaces with a tab in Sublime Text 2?
... |
edited Aug 6 '12 at 21:35
ruffin
12.5k77 gold badges6767 silver badges114114 bronze badges
answered M...
How can I specify a [DllImport] path at runtime?
...mind.
In fact, it isn't even DllImport that handles it. It's the native Win32 DLL loading rules that govern things, regardless of whether you're using the handy managed wrappers (the P/Invoke marshaller just calls LoadLibrary). Those rules are enumerated in great detail here, but the important ones ...
C# Double - ToString() formatting with two decimal places but no rounding
...cate(myDoubleValue * 100) / 100;
For instance:
If the number is 50.947563 and you use the following, the following will happen:
- Math.Truncate(50.947563 * 100) / 100;
- Math.Truncate(5094.7563) / 100;
- 5094 / 100
- 50.94
And there's your answer truncated, now to format the string simply do t...
How do I use brew installed Python as the default Python?
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bbaassssiiee
4,39211 gold badge3232 silver badges4646 bronze badges
answered Sep 11 '11 at 0:37
VishalVishal
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