Loops/Increment loop index within loop body: Difference between revisions

Content added Content deleted

Inline

@@ Line 4,174: / Line 4,174: @@
 =={{header|Wren}}==
+{{libheader|fmt}}
-Although one can (apparently) change the index variable within a ''for'' loop, it does in fact change a local copy of the variable and the iteration is not affected at all. Consequently, the only way to complete this task in Wren is to use a ''while'' loop.
+Although it might appear as though one can change the index variable within a ''for'' loop, it does in fact change a local copy of the variable and the iteration is not affected at all. Consequently, the only way to complete this task in Wren is to use a ''while'' loop.
-<lang ecmascript>var isPrime = Fn.new { |n|
+<lang ecmascript>import "/fmt" for Fmt
+var isPrime = Fn.new { |n|
     if (n < 2 || !n.isInteger) return false
     if (n%2 == 0) return n == 2
@@ Line 4,187: / Line 4,190: @@
     }
     return true
-}
-var rset = Fn.new { |m, n|
-    var s = "%(n)"
-    var c = s.count
-    return (m > c) ? " " * (m - c) + s : s
-}
-var commatize = Fn.new { |n|
-    var s = "%(n)"
-    var le = s.count
-    var i = le - 3
-    while (i >= 1) {
-        s = s[0...i] + "," + s[i..-1]
-        i = i - 3
-    }
-    return s
 }
@@ Line 4,211: / Line 4,197: @@
     if (isPrime.call(i)) {
         count = count + 1
-        System.print("%(rset.call(2, count)): %(rset.call(18, commatize.call(i)))")
+        System.print("%(Fmt.d(2, count)): %(Fmt.dc(18, i))")
         i = 2 * i - 1
     }