Create HackReactor - Count All Characters.js

revisualize · web-flow · commit ca263eaa4a02 · 2017-03-11T00:51:28.000-08:00
diff --git a/HackReactor - Count All Characters.js b/HackReactor - Count All Characters.js
@@ -0,0 +1,40 @@
+/* 
+Direction: Given a string, "countAllCharacters" returns an object where each key is a character in the given string. 
+The value of each key should be how many times each character appeared in the given string.
+*/
+
+/* I hashed this code out in under 3 minutes:
+
+function countAllCharacters(str) {
+    var result = { };
+    for (let i = 0; i < str.length; i++) {
+      if (result.hasOwnProperty(str[i])) {
+        result[str[i]]++;
+      } else {
+        result[str[i]] = 1;
+      }
+    }
+    return result;
+}
+countAllCharacters("banana");
+
+*/
+
+// Refactored to this code:
+
+function countAllCharacters(str) {
+    var result = { };
+    str.replace(/[\s\S]/g, function(i) {
+        result[i] = (result.hasOwnProperty(i)) ? result[i]+1 : 1; });
+    return result;
+}
+countAllCharacters("banana");
+// test output: { b: 1, a: 3, n: 2 }
+
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