concat

Use concat to take a list of strings str-list and concatenate each of the strings in the list, returning the resulting string.

Basic syntax

To concatenate each string in a list, use the following syntax:

(concat [str-list])

Arguments

Use the following argument to specify the list of strings str-list for the concat Pact function.

Argument	Type	Description
str-list	[string]	Specifies the list of strings to concatenate.

Return value

The concat function returns the resulting string after concatenating all the strings in the str-list.

Examples

The following example demonstrates the concat function in the Pact REPL:

pact>(concat ["k" "d" "a"])
"kda"

In this example, concat takes the list ["k" "d" "a"] and concatenates each string in the list, resulting in the string "kda".

The following example shows how to concatenate a list of strings after mapping each element with a function:

pact>(concat (map (+ " ") (str-to-list "abcde")))
"a b c d e"

In this example, (str-to-list "abcde") converts the string "abcde" into a list of characters ["a" "b" "c" "d" "e"]. Then, (map (+ " ") ...) maps the function (+ " ") to each character, adding a space after each character. Finally, concat concatenates all the strings in the resulting list, producing the string "a b c d e".