Data update

Task/Commatizing-numbers/JavaScript/commatizing-numbers.js

@@ -0,0 +1,42 @@
+function contains(haystack, needle) {
+  return haystack.indexOf(needle) !== -1;
+}
+
+function commatize(text, start_index = 0, step = 3, separator = ",") {
+  console.log("Before: " + text);
+  const size = text.length;
+
+  for (let i = start_index; i < size; ++i) {
+    if (contains("123456789", text[i])) {
+      for (let j = i + 1; j <= size; ++j) {
+        if (j > size || !contains("0123456789", text[j])) {
+          for (let k = j - 1 - step; k >= i; k -= step) {
+            text = text.slice(0, k + 1) + separator + text.slice(k + 1);
+          }
+          break;
+        }
+      }
+      break;
+    }
+  }
+
+  console.log(" After: " + text + "\n");
+}
+
+function main() {
+  commatize("pi=3.14159265358979323846264338327950288419716939937510582097494459231", 6, 5, " ");
+  commatize("The author has two Z$100000000000000 Zimbabwe notes (100 trillion).");
+  commatize("\"-in Aus$+1411.8millions\"");
+  commatize("===US$0017440 millions=== (in 2000 dollars)");
+  commatize("123.e8000 is pretty big.");
+  commatize("The land area of the earth is 57268900(29% of the surface) square miles.");
+  commatize("Ain't no numbers in this here words, nohow, no way, Jose.");
+  commatize("James was never known as 0000000007");
+  commatize("Arthur Eddington wrote: I believe there are " +
+             "15747724136275002577605653961181555468044717914527116709366231425076185631031296" +
+             " protons in the universe.");
+  commatize("   $-140000±100 millions.");
+  commatize("6/9/1946 was a good year for some.");
+}
+
+main();