File: join.awk

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# join.awk --- join an array into a string
# Arnold Robbins, arnold@gnu.org, Public Domain
# May 1993

function join(array, start, end, sep,    result, i)
{
    if (sep == "")
       sep = " "
    else if (sep == SUBSEP) # magic value
       sep = ""
    result = array[start]
    for (i = start + 1; i <= end; i++)
        result = result sep array[i]
    return result
}