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Shell Programming and Scripting
When does an if statement need parentheses
Post 302546050 by Scrutinizer on Wednesday 10th of August 2011 09:36:21 AM
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I'm trying to use the following command to do a batch find and replace in all commonly named files through a file hierarchy
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which works fine except for a substitution involving parenthesis.
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Hi
I would like to replace a comma in parentheses to a semicolon for example. Other commas outside () stay unchanged. How can I do this?
aaaa,bbb,ccc,ddd(eee,fff,ggg),hhh,iii
to
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hi, unix gurus.
i am wondering if someone can give me a clear explanation of the differneces between parentheses and brackets, both single and double.
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Hello,
I have done a great deal of research on this and still cannot come to an understanding of the following:
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Hi,
I tried to adapt bartus's solution to my problem, without success. I want to replace all the occurences of this:
with:
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Hi.could you explain me what are the rules when we are using double parentesis in if statement,if I put ,the code is working ,with (( is not
#!/bin/bash
if (($# > 0))
then
if ((! -d "$1"))
then
echo "Directory $1 not found"
fi
else
echo Problem
fi (8 Replies)
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This is my input file:
a|b|c(ef)|g|h(km)|p
My output file should look like:
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How to remove first pair of parentheses and content in them from the beginning of the line?
Here's the list:
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test-(ing)
Desired result:
test
test-(ing)
test-(ing)-test
test-(ing)
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Suppose I have this code :
int main () { int i = NULL; /* incorrect */ return 0; }
and I want to put the word between the two parentheses
like this :
int main (void) { int i = NULL; /* incorrect */ return 0; }
which command is used to do it in Linux ? (2 Replies)
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LEARN ABOUT MINIX
let
let(1) User Commands let(1) NAME
let - shell built-in function to evaluate one or more arithmetic expressions SYNOPSIS
ksh let arg... DESCRIPTION
ksh Each arg is a separate "arithmetic expression" to be evaluated. EXIT STATUS
The following exit values are returned: 0 The value of the last expression is non-zero. 1 The value of the last expression is zero. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
ksh(1), set(1), typeset(1), attributes(5) SunOS 5.10 15 Apr 1994 let(1)