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The `trim()` function removes specific leading and trailing characters from
a given input string. If the characters to trim are unspecified, the space, tab,
carriage return and newline characters will be used by default.
Returns a copy of the input string with the specified leading and trailing
characters removed.
Returns `null` if the given input argment is not a valid string value.
-- Testcase --
{%
printf("%.J\n", [
// not specifying trim characters will trim whitespace
trim(" Hello World! \r\n"),
// if trim characters are specified, only those are removed
trim("|* Foo Bar +|", "+*|"),
// trim does not affect characters in the middle of the string
trim(" Foo Bar "),
trim("|Foo|Bar|", "|")
]);
%}
-- End --
-- Expect stdout --
[
"Hello World!",
" Foo Bar ",
"Foo Bar",
"Foo|Bar"
]
-- End --
Supplying an invalid string will yield `null`.
-- Testcase --
{%
printf("%.J\n", trim(true));
%}
-- End --
-- Expect stdout --
null
-- End --
|
