jq, 4 characters (3 characters code + 1 character command-line option.) env CW because I am sure this is not the kind of answer you intended to allow. Sample run: bash-4.3$ jq -n 'env' { "GIT_PS1_SHOWDIRTYSTATE": "1", "TERM": "xterm", "SHELL": "/bin/bash", "GIT_PS1_SHOWUNTRACKEDFILE...

///, 15 14 characters /a/{":1234}/aa (At least the output is 1 2 characters longer than the code.) Thanks to: ETHproductions for reusing the object delimiters as part of key (-1 character) Sample run: bash-4.3$ slashes.pl <<< '/a/{":1234}/aa' {":1234}{":1234} Just to make it more reada...

///, 15 14 characters /a/{":1234}/aa (At least the output is 1 2 characters longer than the code.) Try it online! Thanks to: ETHproductions for reusing the object delimiters as part of key (-1 character) Sample run: bash-4.3$ slashes.pl <<< '/a/{":1234}/aa' {":1234}{":1234} Just to ma...