11 lines
285 B
Text
11 lines
285 B
Text
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fcn range(ns){
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fcn(w){
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if (w.atEnd) return(Void.Stop);
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a:=b:=w.next(); n:=0;
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while(b+1 == (c:=w.peekN(n))){ n+=1; b=c }
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if(n>1){do(n){w.next()}; return("%d-%d".fmt(a,b)); }
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a
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} :
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(0).pump(*,List,_.fp(ns.walker().tweak(Void,Void))).concat(",");
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}
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