Bash for: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
|||
Line 15: | Line 15: | ||
</pre> | </pre> | ||
Alternatively, for: | |||
<pre> | |||
for i; do commands; done | |||
</pre> | |||
''commands'' executes for each positional parameter (as if <tt>in "$@"</tt> had been specified. | |||
Yes another alternative form: | |||
<pre> | |||
for (( i=0; i<${#names[@]}; i++ )); do | for (( i=0; i<${#names[@]}; i++ )); do | ||
local name=${names[${i}]} | local name=${names[${i}]} | ||
echo "${name}" | echo "${name}" | ||
done | done | ||
</pre> | |||
!!!Iterating through $1, $2, $3 ... | !!!Iterating through $1, $2, $3 ... |
Revision as of 23:54, 29 February 2016
External
Internal
Overview
The for built-in command expand words, and execute commands once for each member in the resultant list, with i bound to the current member.
for i in words; do commands; done
Alternatively, for:
for i; do commands; done
commands executes for each positional parameter (as if in "$@" had been specified.
Yes another alternative form:
for (( i=0; i<${#names[@]}; i++ )); do local name=${names[${i}]} echo "${name}" done
!!!Iterating through $1, $2, $3 ...
{{{
for i do echo ${i} done
}}}
!!!Iterating through a space separated list
{{{
s="a b c"
for i in ${s} do echo ${i} done
}}}
or
{{{
s="a b c"
for i in ${s}; do echo ${i}; done
}}}
Note the use of ";"
__Referenced by:__\\
[{INSERT com.ecyrd.jspwiki.plugin.ReferringPagesPlugin WHERE max=20, maxwidth=50}]