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ringerxyz

02-15-2005 03:26 AM

how to manipulate string in script?

for example:
if a string str ="abcde",and now I want get first 4 characters out from the string,
how should I do?

jlliagre

02-15-2005 03:33 AM

bash only way:

Code:

${str:0:4}

portable way:

Code:

expr "$str" : '$.\{4\}$'

The latter doesn't output anything if the wariable length is less than 4.

chrism01

02-17-2005 01:14 AM

Another portable method:

echo asdfgh|cut -c1-4
asdf

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