Anonymous user
Look-and-say sequence: Difference between revisions
→{{header|JavaScript}}
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=={{header|JavaScript}}==
=== With RegExp ===
{{trans|Perl}}
<lang javascript>function lookandsay(str) {
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}</lang>
=== Imperative version ===
<lang javascript>function lookAndSay( s="" ){
var tokens=[]
var i=0, j=1
while( i<s.length ) {
while( j<s.length && s[j]===s[i] ) j++
tokens.push( `${j-i}${s[i]}` )
i=j++
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return tokens.join("")
}
for(let n=0,phrase="1"; n<10; n++ )
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