fun/join

Composable version of array join.

Syntax

str = join(arr, [separator = ','])

Parameters

• arr [Array] The array to be joined.

• separator Optional. Specifies a string to separate each element of the array. The separator is converted to a string if necessary. If omitted, the array elements are separated with a comma. If separator is an empty string, all elements are joined without any characters in between them.

Examples

Joining an array four different ways

The following example creates an array, a, with three elements, then joins the array four times: using the default separator, then a comma and a space, then a plus and an empty string.

var a = ['Wind', 'Rain', 'Fire']
join(a)        // 'Wind,Rain,Fire'
join(a, ', ')  // 'Wind, Rain, Fire'
join(a, ' + ') // 'Wind + Rain + Fire'
join(a, '')    // 'WindRainFire'