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What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
...ariable is unset or not set. REF: github.com/koalaman/shellcheck/wiki/SC2154
– Nam Nguyen
Apr 7 '15 at 4:32
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Uber5岁了，一次性告诉你它的商业之道 - 资讯 - 清泛网 - 专注C/C++及内核技术
...杉矶出租车司机联盟2009年的一份调查报告显示：这座近400万人口的城市当时只有9家出租车公司，2303辆出租车。
卡兰尼克的父亲是名工程师，母亲从事媒体广告业务。说来有些奇特，Uber后来的样子，有些像卡兰尼克父母工作内...
Formatting Numbers by padding with leading zeros in SQL Server
...lue you passed in.
– Mordy
Feb 13 '14 at 10:30
2
Though its old... using "+ convert (varchar, Emp...
Rails: select unique values from a column
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454
Model.select(:rating)
Result of this is a collection of Model objects. Not plain ratings. An...
How to efficiently build a tree from a flat structure?
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edited May 10 '13 at 13:24
Guido Preite
13.6k33 gold badges3131 silver badges6363 bronze badges
answere...
What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?
...ex 0) and throw an exception when index is 5. The valid indexes here are 0-4 inclusive. The correct, idiomatic for statement here would be:
for (int index = 0; index < array.length; index++)
(That's assuming you need the index, of course. If you can use the enhanced for loop instead, do so.)
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What characters are valid for JavaScript variable names?
...$A-Z\_a-z\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\...
Entity Framework vs LINQ to SQL
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484
LINQ to SQL only supports 1 to 1 mapping of database tables, views, sprocs and functions avail...
Keyboard shortcut to change font size in Eclipse?
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Eclipse Neon (4.6)
Zoom In
Ctrl++
or
Ctrl+=
Zoom Out
Ctrl+-
This feature is described here:
In text editors, you can now use Zoom In (Ctrl++ or Ctrl+=) and Zoom Out (Ctrl+-) commands to increase and decrease the font size.
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How to pass variable number of arguments to a PHP function
...he output :
int 3
array
0 => int 10
1 => string 'glop' (length=4)
2 => string 'test' (length=4)
ie, 3 parameters ; exactly like iof the function was called this way :
test(10, 'glop', 'test');
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