Latest Version: - 0.2.4 + 0.2.5
While Loops - The only low-level loop that CoffeeScript provides is the while loop. + The only low-level loop that CoffeeScript provides is the while loop. The + main difference from JavaScript is that the while loop can be used + as an expression, returning an array containing the result of each iteration + through the loop.
- <%= code_for('while') %> + <%= code_for('while', 'lyrics.join("\n")') %>Other JavaScript loops, such as for loops and do-while loops can be mimicked by variations on while, but the hope is that you @@ -528,6 +532,17 @@ coffee --print app/scripts/*.coffee > concatenation.js
<%= code_for('object_extraction', 'poet + " — " + street') %> ++ Function binding + The long arrow ==> can be used to both define a function, and to bind + it to the current value of this, right on the spot. This is helpful + when using callback-based libraries like Prototype or jQuery, for creating + iterator functions to pass to each, or event-handler functions + to use with bind. Functions created with the long arrow are able to access + properties of the this where they're defined. +
+ <%= code_for('long_arrow') %> +Embedded JavaScript Hopefully, you'll never need to use it, but if you ever need to intersperse @@ -546,6 +561,11 @@ coffee --print app/scripts/*.coffee > concatenation.js in a returnable, assignable expression. The format is: switch condition, when clauses, else the default case.
++ As in Ruby, switch statements in CoffeeScript can take multiple + values for each when clause. If any of the values match, the clause + runs. +
<%= code_for('switch') %>@@ -624,7 +644,16 @@ coffee --print app/scripts/*.coffee > concatenation.js
+ 0.2.5 + The conditions in switch statements can now take multiple values at once — + If any of them are true, the case will run. Added the long arrow ==>, + which defines and immediately binds a function to this. While loops can + now be used as expressions, in the same way that comprehensions can. Splats + can be used within pattern matches to soak up the rest of an array. +
+0.2.4 Added ECMAScript Harmony style destructuring assignment, for dealing with diff --git a/documentation/js/array_comprehensions.js b/documentation/js/array_comprehensions.js index fe7d5db668..fae31ce941 100644 --- a/documentation/js/array_comprehensions.js +++ b/documentation/js/array_comprehensions.js @@ -3,7 +3,7 @@ // Eat lunch. lunch = (function() { __a = []; __b = ['toast', 'cheese', 'wine']; - for (__c=0; __c<__b.length; __c++) { + for (__c = 0; __c < __b.length; __c++) { food = __b[__c]; __a.push(eat(food)); } @@ -11,10 +11,10 @@ })(); // Naive collision detection. __d = asteroids; - for (__e=0; __e<__d.length; __e++) { + for (__e = 0; __e < __d.length; __e++) { roid = __d[__e]; __f = asteroids; - for (__g=0; __g<__f.length; __g++) { + for (__g = 0; __g < __f.length; __g++) { roid2 = __f[__g]; if (roid !== roid2) { if (roid.overlaps(roid2)) { diff --git a/documentation/js/expressions_comprehension.js b/documentation/js/expressions_comprehension.js index 2d159d9f4f..294c3db4ed 100644 --- a/documentation/js/expressions_comprehension.js +++ b/documentation/js/expressions_comprehension.js @@ -1,10 +1,11 @@ (function(){ var __a, __b, globals, name; + var __hasProp = Object.prototype.hasOwnProperty; // The first ten global properties. globals = ((function() { __a = []; __b = window; for (name in __b) { - if (__b.hasOwnProperty(name)) { + if (__hasProp.call(__b, name)) { __a.push(name); } } diff --git a/documentation/js/long_arrow.js b/documentation/js/long_arrow.js new file mode 100644 index 0000000000..8e60b143e1 --- /dev/null +++ b/documentation/js/long_arrow.js @@ -0,0 +1,20 @@ +(function(){ + var Account; + Account = function Account(customer, cart) { + var __a, __b; + var __this = this; + this.customer = customer; + this.cart = cart; + __a = $('.shopping_cart').bind('click', (function() { + __b = function(event) { + var __c; + __c = this.customer.purchase(this.cart); + return Account === this.constructor ? this : __c; + }; + return (function() { + return __b.apply(__this, arguments); + }); + })()); + return Account === this.constructor ? this : __a; + }; +})(); \ No newline at end of file diff --git a/documentation/js/object_comprehensions.js b/documentation/js/object_comprehensions.js index 81d94a417c..9c7d3783b9 100644 --- a/documentation/js/object_comprehensions.js +++ b/documentation/js/object_comprehensions.js @@ -1,5 +1,6 @@ (function(){ var __a, __b, age, ages, child, years_old; + var __hasProp = Object.prototype.hasOwnProperty; years_old = { max: 10, ida: 9, @@ -9,7 +10,7 @@ __a = []; __b = years_old; for (child in __b) { age = __b[child]; - if (__b.hasOwnProperty(child)) { + if (__hasProp.call(__b, child)) { __a.push(child + " is " + age); } } diff --git a/documentation/js/overview.js b/documentation/js/overview.js index 1e61b37199..2098e3a30f 100644 --- a/documentation/js/overview.js +++ b/documentation/js/overview.js @@ -34,7 +34,7 @@ // Array comprehensions: cubed_list = (function() { __a = []; __b = list; - for (__c=0; __c<__b.length; __c++) { + for (__c = 0; __c < __b.length; __c++) { num = __b[__c]; __a.push(math.cube(num)); } diff --git a/documentation/js/switch.js b/documentation/js/switch.js index 53406faae9..77e9a77d5b 100644 --- a/documentation/js/switch.js +++ b/documentation/js/switch.js @@ -1,14 +1,16 @@ (function(){ - if (day === "Tuesday") { - eat_breakfast(); - } else if (day === "Wednesday") { + if (day === "Mon") { + go_to_work(); + } else if (day === "Tue") { go_to_the_park(); - } else if (day === "Saturday") { + } else if (day === "Thu") { + go_ice_fishing(); + } else if (day === "Fri" || day === "Sat") { if (day === bingo_day) { go_to_bingo(); go_dancing(); } - } else if (day === "Sunday") { + } else if (day === "Sun") { go_to_church(); } else { go_to_work(); diff --git a/documentation/js/while.js b/documentation/js/while.js index cc83571984..0ac87e11a4 100644 --- a/documentation/js/while.js +++ b/documentation/js/while.js @@ -1,9 +1,20 @@ (function(){ - while (demand > supply) { - sell(); - restock(); - } - while (supply > demand) { - buy(); + var __a, lyrics, num; + if (this.studying_economics) { + while (supply > demand) { + buy(); + } + while (supply < demand) { + sell(); + } } + num = 6; + lyrics = (function() { + __a = []; + while (num -= 1) { + __a.push(num + " little monkeys, jumping on the bed. \ +One fell out and bumped his head."); + } + return __a; + })(); })(); \ No newline at end of file diff --git a/documentation/speed.html b/documentation/speed.html index 52d99650b6..c8406ba4b7 100644 --- a/documentation/speed.html +++ b/documentation/speed.html @@ -14,63 +14,39 @@