Add compose with loop

tshemsedinov · tshemsedinov · commit 62634627a6a3 · 2018-10-05T14:42:11.000+03:00
diff --git a/JavaScript/5-loop.js b/JavaScript/5-loop.js
@@ -0,0 +1,30 @@
+'use strict';
+
+const compose = (...fns) => (...args) => {
+  if (fns.length === 0) return args[0];
+
+  let res = fns[0](...args);
+  for (let i = 1; i < fns.length; i++) {
+    res = fns[i](res);
+  }
+  return res;
+};
+
+// Usage
+
+const upperCapital = s => s.replace(
+  /\w+/g,
+  word => word.charAt(0).toUpperCase() + word.substr(1)
+);
+
+const lower = s => (typeof s === 'string' ? s.toLowerCase() : '');
+
+const trim = s => s.trim();
+
+const s = '   MARCUS AURELIUS   ';
+console.log(s);
+console.log('lower(' + s + ') = ' + lower(s));
+console.log('upperCapital(' + s + ') = ' + upperCapital(s));
+
+const capitalize = compose(trim, lower, upperCapital);
+console.log('capitalize(' + s + ') = ' + capitalize(s));
