mjc comment on Update on Famous Awk One-Liners Explained: String and Array Creation

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Awk one-liners explained

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mjc Permalink

February 09, 2009, 22:53

Another way to make n copies of a string s:

function repeat(n, s      , str)
{
   str = sprintf("%*s", n, " "); # make n spaces
   gsub(/ /, s, str); # replace space with s
   return str;
}

Another idiom I sometimes use is this to make a string of "-" to underline another string:

ul = str; # copy the string
gsub(/./, "-", ul); # replace each char with "-"
print str; # print the string
print ul; # underline it

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Update on Famous Awk One-Liners Explained: String and Array Creation