The following is a wonderful post on stdin, stdout, stderr.
1
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Notes:
1.[-n string] 将会测试string的长度,如果大于0, 则返回true
2.awesome os-x command line:
1
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The following is a wonderful post on stdin, stdout, stderr.
1
|
|
Notes:
1.[-n string] 将会测试string的长度,如果大于0, 则返回true
2.awesome os-x command line:
1
|
|