Improve examples

Author: tshemsedinov

JavaScript/1-closure.js

@@ -1,13 +1,15 @@
 'use strict';
 
-const log = (base, n) => Math.log(n) / Math.log(base);
+const { log: ln } = Math;
+const log = (base, n) => ln(n) / ln(base);
 
 const createLog = base => n => log(base, n);
 
 // Usage
+{
+  const lg = createLog(10);
+  const ln = createLog(Math.E);
 
-const lg = createLog(10);
-const ln = createLog(Math.E);
-
-console.log('lg(5) = ' + lg(5));
-console.log('ln(5) = ' + ln(5));
+  console.log('lg(5) =', lg(5));
+  console.log('ln(5) =', ln(5));
+}

JavaScript/2-lambda.js

@@ -1,11 +1,13 @@
 'use strict';
 
-const log = (base, n) => Math.log(n) / Math.log(base);
+const { log: ln } = Math;
+const log = (base, n) => ln(n) / ln(base);
 
 // Usage
+{
+  const lg = n => log(10, n);
+  const ln = n => log(Math.E, n);
 
-const lg = n => log(10, n);
-const ln = n => log(Math.E, n);
-
-console.log('lg(5) = ' + lg(5));
-console.log('ln(5) = ' + ln(5));
+  console.log('lg(5) =', lg(5));
+  console.log('ln(5) =', ln(5));
+}

JavaScript/3-bind.js

@@ -1,11 +1,13 @@
 'use strict';
 
-const log = (base, n) => Math.log(n) / Math.log(base);
+const { log: ln } = Math;
+const log = (base, n) => ln(n) / ln(base);
 
 // Usage
+{
+  const lg = log.bind(null, 10);
+  const ln = log.bind(null, Math.E);
 
-const lg = log.bind(null, 10);
-const ln = log.bind(null, Math.E);
-
-console.log('lg(5) = ' + lg(5));
-console.log('ln(5) = ' + ln(5));
+  console.log('lg(5) = ' + lg(5));
+  console.log('ln(5) = ' + ln(5));
+}