strings.Substr
Syntax
strings.Substr STRING START [LENGTH] ⟼ string
Alias
substr
It normally takes two argument: start
and length
. It can also take one argument: start
, i.e. length
is omitted, in which case the substring starting from start until the end of the string will be returned.
To extract characters from the end of the string, use a negative start number.
If length
is given and is negative, that number of characters will be omitted from the end of string.
{{ substr "abcdef" 0 }} → "abcdef"
{{ substr "abcdef" 1 }} → "bcdef"
{{ substr "abcdef" 0 1 }} → "a"
{{ substr "abcdef" 1 1 }} → "b"
{{ substr "abcdef" 0 -1 }} → "abcde"
{{ substr "abcdef" 1 -1 }} → "bcde"
{{ substr "abcdef" -1 }} → "f"
{{ substr "abcdef" -2 }} → "ef"
{{ substr "abcdef" -1 1 }} → "f"
{{ substr "abcdef" -2 1 }} → "e"
{{ substr "abcdef" -3 -1 }} → "de"
{{ substr "abcdef" -3 -2 }} → "d"