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xxx.sh: line x: [0: command not found - 更多技术 - 清泛网 - 专注C/C++及内核技术
xxx.sh: line x: [0: command not found由于if [后面没有加空格导致的。if [ xxx ] 表达式前后都要有空格。由于if [ 后面没有加空格导致的。
if [ xxx ] 表达式前后都要有空格。command not found
Discuz X 首页白板解决之道 - 更多技术 - 清泛网 - 专注C/C++及内核技术
Discuz X 首页白板解决之道1、开启Debug，及url后面跟 &debug=yes，也是网上最多的方法，但可能往往没有效果。2、排除法，代码一段段的排查，在合适位置打印特定内容然后exit(0);查看结果，分析出现问题的 1、开启Debug，及url后面...
Return two and more values from a method
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def sumdiff(x, y)
return x+y, x-y
end
#=> nil
sumdiff(3, 4)
#=> [7, -1]
a = sumdiff(3,4)
#=> [7, -1]
a
#=> [7, -1]
a,b=sumdiff(3,4)
#=> [7, -1]
a
#=> 7
b
#=> -1
a,b,c=sumdiff(3,4)
#=> [7, -1]
a
#=> 7
b
#=...
OSX - How to auto Close Terminal window after the “exit” command executed.
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You can also select all the profiles, and make the change to all at once.
– user2191247
Jun 8 '18 at 14:34
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Qt: How do I handle the event of the user pressing the 'X' (close) button?
... don't know which slot corresponds to the event of "the user clicking the 'X'(close) button of the window frame" i.e. this button:
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Flat file databases [closed]
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Well, what is the nature of the flat databases. Are they large or small. Is it simple arrays with arrays in them? if its something simple say userprofiles built as such:
$user = array("name" => "dubayou",
"age" => 20,
"websites" => array("dubayou.com",...
How do you fix a bad merge, and replay your good commits onto a fixed merge?
I accidentally committed an unwanted file ( filename.orig while resolving a merge) to my repository several commits ago, without me noticing it until now. I want to completely delete the file from the repository history.
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What's the best way to trim std::string?
I'm currently using the following code to right-trim all the std::strings in my programs:
46 Answers
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Nested attributes unpermitted parameters
... Person . I want a form that can create the Bill and its children Dues all in one page. I am trying to create a form using nested attributes, similar to ones in this Railscast .
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What are the most common non-BMP Unicode characters in actual use? [closed]
... ‹ › GC=Zs EM SPACE
528576 U+0003BC ‹μ› GC=Ll GREEK SMALL LETTER MU
519669 U+0003B2 ‹β› GC=Ll GREEK SMALL LETTER BETA
512312 U+0003B1 ‹α› GC=Ll GREEK SMALL LETTER ALPHA
491842 U+00200A ‹ › GC=Zs HAIR SPACE
462505 U+0000B0 ‹°› GC=So DE...