Data commit

Task/Determine-if-a-string-is-collapsible/JavaScript/determine-if-a-string-is-collapsible.js

@@ -0,0 +1,21 @@
+String.prototype.collapse = function() {
+  let str = this;
+  for (let i = 0; i < str.length; i++) {
+    while (str[i] == str[i+1]) str = str.substr(0,i) + str.substr(i+1);
+  }
+  return str;
+}
+
+// testing
+let strings = [
+  '',
+  '"If I were two-faced, would I be wearing this one?" --- Abraham Lincoln ',
+  '..1111111111111111111111111111111111111111111111111111111111111117777888',
+  `I never give 'em hell, I just tell the truth, and they think it's hell. `,
+  '                                                    --- Harry S Truman  '
+];
+for (let i = 0; i < strings.length; i++) {
+  let str = strings[i], col = str.collapse();
+  console.log(`«««${str}»»» (${str.length})`);
+  console.log(`«««${col}»»» (${col.length})`);
+}