Added more JavaScript examples and knowledge.map dependencies

Author: tshemsedinov

.jshintrc

@@ -0,0 +1,4 @@
+{
+  "esversion": 6,
+  "node": true
+}

JavaScript/1-closure.js JavaScript/1-context.jsJavaScript/1-closure.js renamed to JavaScript/1-context.js

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+'use strict';
+
+function add(x) {
+  return function(y) {
+    let z = x + y;
+    console.log(x + '+' + y + '=' + z);
+    return z;
+  };
+}
+
+add(3)(6);

JavaScript/3-closure.js

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+'use strict';
+
+function add(x) {
+  return function(y) {
+    let z = x + y;
+    console.log(x + '+' + y + '=' + z);
+    return add(z);
+  };
+}
+
+let a1 = add(5);
+let a2 = a1(2);
+let a3 = a2(3);
+let a4 = a1(1);
+let a5 = a2(10);
+
+console.log('--------');
+
+add(1)(4)(8)(8);

JavaScript/4-closure-recursive.js

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+'use strict';
+
+function logger(level) {
+  let color = logger.colors[level] || logger.colors.info;
+  return function(s) {
+    let date = new Date().toISOString();
+    console.log(color + date + '\t' + s);
+  };
+}
+
+logger.colors = {
+  warning: '\x1b[1;33m',
+  error: '\x1b[0;31m',
+  info: '\x1b[1;37m'
+};
+
+let warning = logger('warning');
+let error = logger('error');
+let debug = logger('debug');
+
+warning('Hello');
+error('World');
+debug('Bye!');

JavaScript/5-logger.js

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+'use strict';
+
+function add(x) {
+  let f = function(y) {
+    let z = x + y;
+    console.log(x + '+' + y + '=' + z);
+    return add(z);
+  };
+  f.map = function(fn) {
+    fn(x);
+  };
+  return f;
+}
+
+let a1 = add(5);
+let a2 = a1(2);
+let a3 = a2(3);
+let a4 = a1(1);
+let a5 = a2(10);
+a5.map(console.log);
+
+add(2)(7)(1).map(console.log);

JavaScript/6-functor.js

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+{
+  dependencies: ['HigherOrderFunction']
+}