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Merge pull request #238 from summer-wu/master

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create tr cheatsheet
This commit is contained in:
Chris Lane 2015-10-15 18:26:04 -04:00
commit baa782b8ce
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#replace : with new line
echo $PATH|tr ":" "\n" #equivalent with:
echo $PATH|tr -t ":" \n
#remove all occurance of "ab"
echo aabbcc |tr -d "ab"
#ouput: cc
#complement "aa"
echo aabbccd |tr -c "aa" 1
#output: aa11111 without new line
#tip: Complement meaning keep aa,all others are replaced with 1
#complement "ab\n"
echo aabbccd |tr -c "ab\n" 1
#output: aabb111 with new line
#Preserve all alpha(-c). ":-[:digit:] etc" will be translated to "\n". sequeeze mode.
echo $PATH|tr -cs "[:alpha:]" "\n"
#ordered list to unordered list
echo "1. /usr/bin\n2. /bin" |tr -cs " /[:alpha:]\n" "+"