From c3ac17296078b94aa20bd00faf30d4e018c46d87 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Tue, 16 Apr 2013 01:52:47 -0700
Subject: [PATCH] Simplify `_.debounce` and `_.throttle` for the `underscore`
 build.

Former-commit-id: 56dc526cf71130084651d06b8caadce573471131
---
 build.js                      | 65 +++++++++++++++++++++++++++++++++++
 dist/lodash.underscore.js     | 43 ++++++-----------------
 dist/lodash.underscore.min.js | 56 +++++++++++++++---------------
 3 files changed, 104 insertions(+), 60 deletions(-)

diff --git a/build.js b/build.js
index 47ed7c2ae..f25063733 100755
--- a/build.js
+++ b/build.js
@@ -2059,6 +2059,36 @@
           '}'
         ].join('\n'));
 
+        // replace `_.debounce`
+        source = replaceFunction(source, 'debounce', [
+          'function debounce(func, wait, immediate) {',
+          '  var args,',
+          '      result,',
+          '      thisArg,',
+          '      timeoutId;',
+          '',
+          '  function delayed() {',
+          '    timeoutId = null;',
+          '    if (!immediate) {',
+          '      result = func.apply(thisArg, args);',
+          '    }',
+          '  }',
+          '  return function() {',
+          '    var isImmediate = immediate && !timeoutId;',
+          '    args = arguments;',
+          '    thisArg = this;',
+          '',
+          '    clearTimeout(timeoutId);',
+          '    timeoutId = setTimeout(delayed, wait);',
+          '',
+          '    if (isImmediate) {',
+          '      result = func.apply(thisArg, args);',
+          '    }',
+          '    return result;',
+          '  };',
+          '}'
+        ].join('\n'));
+
         // replace `_.defaults`
         source = replaceFunction(source, 'defaults', [
           'function defaults(object) {',
@@ -2374,6 +2404,41 @@
           '}'
         ].join('\n'));
 
+        // replace `_.throttle`
+        source = replaceFunction(source, 'throttle', [
+          'function throttle(func, wait) {',
+          '  var args,',
+          '      result,',
+          '      thisArg,',
+          '      timeoutId,',
+          '      lastCalled = 0;',
+          '',
+          '  function trailingCall() {',
+          '    lastCalled = new Date;',
+          '    timeoutId = null;',
+          '    result = func.apply(thisArg, args);',
+          '  }',
+          '  return function() {',
+          '    var now = new Date,',
+          '        remaining = wait - (now - lastCalled);',
+          '',
+          '    args = arguments;',
+          '    thisArg = this;',
+          '',
+          '    if (remaining <= 0) {',
+          '      clearTimeout(timeoutId);',
+          '      timeoutId = null;',
+          '      lastCalled = now;',
+          '      result = func.apply(thisArg, args);',
+          '    }',
+          '    else if (!timeoutId) {',
+          '      timeoutId = setTimeout(trailingCall, remaining);',
+          '    }',
+          '    return result;',
+          '  };',
+          '}'
+        ].join('\n'));
+
         // replace `_.times`
         source = replaceFunction(source, 'times', [
           'function times(n, callback, thisArg) {',
diff --git a/dist/lodash.underscore.js b/dist/lodash.underscore.js
index 0dbf74319..5712d6669 100644
--- a/dist/lodash.underscore.js
+++ b/dist/lodash.underscore.js
@@ -3482,35 +3482,27 @@
    * var lazyLayout = _.debounce(calculateLayout, 300);
    * jQuery(window).on('resize', lazyLayout);
    */
-  function debounce(func, wait, options) {
+  function debounce(func, wait, immediate) {
     var args,
         result,
         thisArg,
-        timeoutId,
-        trailing = true;
+        timeoutId;
 
     function delayed() {
       timeoutId = null;
-      if (trailing) {
+      if (!immediate) {
         result = func.apply(thisArg, args);
       }
     }
-    if (options === true) {
-      var leading = true;
-      trailing = false;
-    } else if (options && objectTypes[typeof options]) {
-      leading = options.leading;
-      trailing = 'trailing' in options ? options.trailing : trailing;
-    }
     return function() {
-      var isLeading = leading && !timeoutId;
+      var isImmediate = immediate && !timeoutId;
       args = arguments;
       thisArg = this;
 
       clearTimeout(timeoutId);
       timeoutId = setTimeout(delayed, wait);
 
-      if (isLeading) {
+      if (isImmediate) {
         result = func.apply(thisArg, args);
       }
       return result;
@@ -3667,35 +3659,22 @@
    * var throttled = _.throttle(updatePosition, 100);
    * jQuery(window).on('scroll', throttled);
    */
-  function throttle(func, wait, options) {
+  function throttle(func, wait) {
     var args,
         result,
         thisArg,
         timeoutId,
-        lastCalled = 0,
-        leading = true,
-        trailing = true;
+        lastCalled = 0;
 
     function trailingCall() {
       lastCalled = new Date;
       timeoutId = null;
-
-      if (trailing) {
-        result = func.apply(thisArg, args);
-      }
-    }
-    if (options === false) {
-      leading = false;
-    } else if (options && objectTypes[typeof options]) {
-      leading = 'leading' in options ? options.leading : leading;
-      trailing = 'trailing' in options ? options.trailing : trailing;
+      result = func.apply(thisArg, args);
     }
     return function() {
-      var now = new Date;
-      if (!timeoutId && !leading) {
-        lastCalled = now;
-      }
-      var remaining = wait - (now - lastCalled);
+      var now = new Date,
+          remaining = wait - (now - lastCalled);
+
       args = arguments;
       thisArg = this;
 
diff --git a/dist/lodash.underscore.min.js b/dist/lodash.underscore.min.js
index e30ba8222..dd6ef3ea8 100644
--- a/dist/lodash.underscore.min.js
+++ b/dist/lodash.underscore.min.js
@@ -4,31 +4,31 @@
  * Build: `lodash underscore exports="amd,commonjs,global,node" -o ./dist/lodash.underscore.js`
  * Underscore.js 1.4.4 underscorejs.org/LICENSE
  */
-;(function(n){function r(n,r){var t;if(n&&vr[typeof n])for(t in n)if(Ar.call(n,t)&&r(n[t],t,n)===nr)break}function t(n,r){var t;if(n&&vr[typeof n])for(t in n)if(r(n[t],t,n)===nr)break}function e(n){var r,t=[];if(!n||!vr[typeof n])return t;for(r in n)Ar.call(n,r)&&t.push(r);return t}function u(n){return n instanceof u?n:new c(n)}function o(n,r){var t=n.b,e=r.b;if(n=n.a,r=r.a,n!==r){if(n>r||typeof n=="undefined")return 1;if(n<r||typeof r=="undefined")return-1}return t<e?-1:1}function i(n,r,t){function e(){var f=arguments,c=o?this:r;
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