Simple JavaScript examples added

Author: tshemsedinov

.gitignore

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+node_modules
+*.log
+.DS_Store

JavaScript/1-closure.js

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+'use strict';
+
+function hash() {
+  let data = {};
+  let counter = 0;
+  return function(key, value) {
+    data[key] = value;
+    counter++;
+    console.dir({ counter });
+    return data;
+  };
+}
+
+let h1 = hash();
+h1('name', 'Marcus');
+h1('city', 'Roma');
+let obj1 = h1('born', 121);
+console.dir({ obj1 });

JavaScript/2-chain.js

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+'use strict';
+
+function hash() {
+  let data = {};
+  Object.defineProperty(data, 'add', {
+    enumerable: false,
+    value: function(key, value) {
+      data[key] = value;
+      return data;
+    }
+  });
+  return data;
+}
+
+console.dir(
+  hash()
+  .add('name', 'Marcus')
+  .add('city', 'Roma')
+  .add('born', 121)
+);