string-join - join strings with delimiter¶
string join [(-q | --quiet)] SEP [STRING...] string join0 [(-q | --quiet)] [STRING...]
string join joins its STRING arguments into a single string separated by SEP, which can be an empty string. Exit status: 0 if at least one join was performed, or 1 otherwise.
string join0 joins its STRING arguments into a single string separated by the zero byte (NUL), and adds a trailing NUL. This is most useful in conjunction with tools that accept NUL-delimited input, such as
sort -z. Exit status: 0 if at least one join was performed, or 1 otherwise.
Because Unix uses NUL as the string terminator, passing the output of
string join0 as an argument to a command (via a command substitution) won't actually work. Fish will pass the correct bytes along, but the command won't be able to tell where the argument ends. This is a limitation of Unix' argument passing.
>_ seq 3 | string join ... 1...2...3 # Give a list of NUL-separated filenames to du (this is a GNU extension) >_ string join0 file1 file2 file\nwith\nmultiple\nlines | du --files0-from=- # Just put the strings together without a separator >_ string join '' a b c abc