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How to concatenate string variables in Bash
...st element only!
So to retrieve our seven field array, we only need to re-set 1st element:
a=36
declare -p a
declare -a a='([0]="36" [1]="18" [2]="one" [3]="word" [4]="hello world!" [5]="he
llo world!" [6]="hello world!")'
One argument format string with many argument passed to:
printf -v a[0] ...
How do I edit an existing tag message in git?
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git tag <tag name> <tag name>^{} -f -m "<new message>"
This will create a new tag with the same name (by overwriting the original).
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What's the meaning of “=>” (an arrow formed from equals & greater than) in JavaScript?
...to ES5 so it works in IE11. So if you need IE11 support and you don't mind setting up Babel then go for it.
– mbokil
Nov 4 '19 at 20:16
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Get names of all files from a folder with Ruby
I want to get all file names from a folder using Ruby.
19 Answers
19
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Loop through files in a directory using PowerShell
... to the original file
$content | Where-Object {$_ -match 'step[49]'} | Set-Content $_.FullName
#filter and save content to a new file
$content | Where-Object {$_ -match 'step[49]'} | Set-Content ($_.BaseName + '_out.log')
}
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How to print out more than 20 items (documents) in MongoDB's shell?
...r yes, you can create a $HOME/.mongorc.js file and put that shellBatchSize setting in there. mine has the query batch size setting and rs.slaveOk() enabled. it's usage is also slightly different when using --eval via commandline. see: docs.mongodb.com/manual/mongo/#mongorc-js-file
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How do I iterate over the words of a string?
I'm trying to iterate over the words of a string.
79 Answers
79
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Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...Shell脚本示例看个例子吧：#! bin shcd ~mkdir shell_tutcd shell_tutfor ((i=0; i<10; i++)); do touch test_$i.txt...
什么是Shell脚本
示例
看个例子吧：
#!/bin/sh
cd ~
mkdir shell_tut
cd shell_tut
for ((i=0; i<10; i++)); do
touch test_$i.txt
done
示例解释...
Lightweight Java Object cache API [closed]
I'm looking for a Java in-memory object caching API. Any recommendations? What solutions have you used in the past?
7 Answe...
Get all related Django model objects
...or link in links:
objects = getattr(a, link).all()
Works for related sets, but not for ForeignKeys. Since RelatedManagers are created dynamically, looking at the class name is easier than doing an isinstance()
objOrMgr = getattr(a, link)
if objOrMgr.__class__.__name__ == 'RelatedManager':
...