Ponyfills for older browsers

lib/built-in/binary-expression.js

@@ -3,6 +3,7 @@
 var typeName = require('type-name');
 var keys = Object.keys || require('object-keys');
 var syntax = require('estraverse').Syntax;
+var forEach = require('array-foreach');
 
 
 function BinaryExpressionRenderer(traversal, config) {
@@ -32,13 +33,13 @@ function BinaryExpressionRenderer(traversal, config) {
     });
     traversal.on('render', function (writer) {
         var pairs = [];
-        keys(_this.espathToPair).forEach(function (espath) {
+        forEach(keys(_this.espathToPair), function (espath) {
             var pair = _this.espathToPair[espath];
             if (pair.left && pair.right) {
                 pairs.push(pair);
             }
         });
-        pairs.forEach(function (pair) {
+        forEach(pairs, function (pair) {
             _this.compare(pair, writer);
         });
     });

lib/built-in/diagram.js

@@ -1,5 +1,7 @@
 'use strict';
 
+var forEach = require('array-foreach');
+
 function DiagramRenderer (traversal, config) {
     this.config = config;
     this.events = [];
@@ -21,7 +23,7 @@ function DiagramRenderer (traversal, config) {
     traversal.on('render', function (writer) {
         _this.events.sort(rightToLeft);
         _this.constructRows(_this.events);
-        _this.rows.forEach(function (columns) {
+        forEach(_this.rows, function (columns) {
             writer.write(columns.join(''));
         });
     });
@@ -67,7 +69,7 @@ DiagramRenderer.prototype.isOverlapped = function (prevCapturing, nextCaputuring
 DiagramRenderer.prototype.constructRows = function (capturedEvents) {
     var that = this;
     var prevCaptured;
-    capturedEvents.forEach(function (captured) {
+    forEach(capturedEvents, function (captured) {
         var dumpedValue = that.stringify(captured.value);
         if (that.isOverlapped(prevCaptured, captured, dumpedValue)) {
             that.addOneMoreRow();

lib/create.js

@@ -8,6 +8,7 @@ var udiff = require('./udiff');
 var defaultOptions = require('./default-options');
 var typeName = require('type-name');
 var extend = require('xtend');
+var map = require('array-map');
 
 // "Browserify can only analyze static requires. It is not in the scope of browserify to handle dynamic requires."
 // https://github.com/substack/node-browserify/issues/377
@@ -51,13 +52,13 @@ function configure (options) {
 
 function create (options) {
     var config = configure(options);
-    var rendererClasses = config.renderers.map(function (rendererName) {
+    var rendererClasses = map(config.renderers, function (rendererName) {
         return findRendererClass(rendererName, config);
     });
     return function (context) {
         var traversal = new ContextTraversal(context);
         var writer = new config.writerClass(extend(config));
-        var renderers = rendererClasses.map(function (RendererClass) {
+        var renderers = map(rendererClasses, function (RendererClass) {
             return new RendererClass(traversal, extend(config));
         });
         traversal.emit('start', context);

lib/traverse.js

@@ -5,6 +5,8 @@ var acorn = require('acorn');
 var EventEmitter = require('events').EventEmitter;
 var inherits = require('util').inherits;
 var EsNode = require('./esnode');
+var forEach = require('array-foreach');
+var reduce = require('array-reduce');
 
 function ContextTraversal (context) {
     this.context = context;
@@ -14,7 +16,7 @@ inherits(ContextTraversal, EventEmitter);
 
 ContextTraversal.prototype.traverse = function () {
     var _this = this;
-    this.context.args.forEach(function (arg) {
+    forEach(this.context.args, function (arg) {
         onEachEsNode(arg, _this.context.source.content, function (esNode) {
             _this.emit('esnode', esNode);
         });
@@ -24,7 +26,7 @@ ContextTraversal.prototype.traverse = function () {
 function onEachEsNode(arg, jsCode, callback) {
     var tokens = [];
     var jsAST = acorn.parse(jsCode, {ecmaVersion: 6, locations: true, onToken: tokens});
-    var espathToValue = arg.events.reduce(function (accum, ev) {
+    var espathToValue = reduce(arg.events, function (accum, ev) {
         accum[ev.espath] = ev.value;
         return accum;
     }, {});

package.json

@@ -12,6 +12,9 @@
   },
   "dependencies": {
     "acorn": "^2.0.1",
+    "array-foreach": "^1.0.1",
+    "array-map": "0.0.0",
+    "array-reduce": "0.0.0",
     "eastasianwidth": "^0.1.0",
     "estraverse": "^4.1.0",
     "googlediff": "^0.1.0",