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more better super docs, better switch docs

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This commit is contained in:
Jeremy Ashkenas 2009-12-23 20:48:55 -05:00
parent 64879cdc66
commit cdfb5091be
4 changed files with 40 additions and 14 deletions
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4
documentation/cs/switch.cs
View file

@ -2,6 +2,8 @@ switch day
case "Tuesday" then eat_breakfast()
case "Wednesday" then go_to_the_park()
case "Saturday"
if day is bingo_day then go_to_bingo().
if day is bingo_day
go_to_bingo()
go_dancing().
case "Sunday" then go_to_church()
else go_to_work().

18
documentation/index.html.erb
View file

@ -290,6 +290,12 @@ coffee-script --print app/scripts/*.cs > concatenation.js</pre>
<a href="http://code.google.com/p/base2/">Base2</a>,
<a href="http://prototypejs.org/">Prototype.js</a>,
<a href="http://jsclass.jcoglan.com/">JS.Class</a>, etc.
The libraries provide syntactic sugar, but the built-in inheritance would
be completely usable if it weren't for one small exception:
it's very awkward to call <b>super</b>, the prototype object's
implementation of the current function. CoffeeScript converts
<tt>super()</tt> calls into calls against the immediate ancestor's
method of the same name.
</p>
<%= code_for('super', true) %>
@ -320,12 +326,14 @@ coffee-script --print app/scripts/*.cs > concatenation.js</pre>
<p id="switch">
<b class="header">Switch/Case/Else</b>
Switch statements in JavaScript are fundamentally broken. You can only
do string comparisons, and need to break at the end of each case
statment to prevent falling through to the default case. CoffeeScript
compiles switch statements into if-else chains, allowing you to
Switch statements in JavaScript are rather broken. You can only
do string comparisons, and need to remember to <b>break</b> at the end of
every <b>case</b> statement to avoid accidentally falling through to
the default case. CoffeeScript
compiles <b>switch</b> statements into JavaScript if-else chains, allowing you to
compare any object (via <b>===</b>), preventing fall-through, and resulting
in a returnable expression.
in a returnable, assignable expression. To specify the default case, just
use <tt>else</tt>.
</p>
<%= code_for('switch') %>

5
documentation/js/switch.js
View file

@ -4,7 +4,10 @@
} else if (day === "Wednesday") {
go_to_the_park();
} else if (day === "Saturday") {
day === bingo_day ? go_to_bingo() : null;
if (day === bingo_day) {
go_to_bingo();
go_dancing();
}
} else if (day === "Sunday") {
go_to_church();
} else {

27
index.html
View file

@ -505,6 +505,12 @@ var three_to_six = nums.slice(3, 6 + 1);
<a href="http://code.google.com/p/base2/">Base2</a>,
<a href="http://prototypejs.org/">Prototype.js</a>,
<a href="http://jsclass.jcoglan.com/">JS.Class</a>, etc.
The libraries provide syntactic sugar, but the built-in inheritance would
be completely usable if it weren't for one small exception:
it's very awkward to call <b>super</b>, the prototype object's
implementation of the current function. CoffeeScript converts
<tt>super()</tt> calls into calls against the immediate ancestor's
method of the same name.
</p>
<div class='code'><pre class="idle"><span class="FunctionName">Animal</span><span class="Keyword">:</span> <span class="Storage">=&gt;</span> .
<span class="FunctionName">Animal.prototype.move</span><span class="Keyword">:</span> <span class="FunctionArgument">meters</span> <span class="Storage">=&gt;</span>
@ -631,18 +637,22 @@ let_the_wild_rumpus_begin() <span class="Keyword">unless</span> answer <span cla
<p id="switch">
<b class="header">Switch/Case/Else</b>
Switch statements in JavaScript are fundamentally broken. You can only
do string comparisons, and need to break at the end of each case
statment to prevent falling through to the default case. CoffeeScript
compiles switch statements into if-else chains, allowing you to
Switch statements in JavaScript are rather broken. You can only
do string comparisons, and need to remember to <b>break</b> at the end of
every <b>case</b> statement to avoid accidentally falling through to
the default case. CoffeeScript
compiles <b>switch</b> statements into JavaScript if-else chains, allowing you to
compare any object (via <b>===</b>), preventing fall-through, and resulting
in a returnable expression.
in a returnable, assignable expression. To specify the default case, just
use <tt>else</tt>.
</p>
<div class='code'><pre class="idle"><span class="Keyword">switch</span> day
<span class="Keyword">case</span> <span class="String"><span class="String">&quot;</span>Tuesday<span class="String">&quot;</span></span> <span class="Keyword">then</span> eat_breakfast()
<span class="Keyword">case</span> <span class="String"><span class="String">&quot;</span>Wednesday<span class="String">&quot;</span></span> <span class="Keyword">then</span> go_to_the_park()
<span class="Keyword">case</span> <span class="String"><span class="String">&quot;</span>Saturday<span class="String">&quot;</span></span>
<span class="Keyword">if</span> day <span class="Keyword">is</span> bingo_day <span class="Keyword">then</span> go_to_bingo().
<span class="Keyword">if</span> day <span class="Keyword">is</span> bingo_day
go_to_bingo()
go_dancing().
<span class="Keyword">case</span> <span class="String"><span class="String">&quot;</span>Sunday<span class="String">&quot;</span></span> <span class="Keyword">then</span> go_to_church()
<span class="Keyword">else</span> go_to_work().
</pre><pre class="idle"><span class="Keyword">if</span> (day <span class="Keyword">===</span> <span class="String"><span class="String">&quot;</span>Tuesday<span class="String">&quot;</span></span>) {
@ -650,7 +660,10 @@ let_the_wild_rumpus_begin() <span class="Keyword">unless</span> answer <span cla
} <span class="Keyword">else</span> <span class="Keyword">if</span> (day <span class="Keyword">===</span> <span class="String"><span class="String">&quot;</span>Wednesday<span class="String">&quot;</span></span>) {
go_to_the_park();
} <span class="Keyword">else</span> <span class="Keyword">if</span> (day <span class="Keyword">===</span> <span class="String"><span class="String">&quot;</span>Saturday<span class="String">&quot;</span></span>) {
day <span class="Keyword">===</span> bingo_day ? go_to_bingo() : <span class="BuiltInConstant">null</span>;
<span class="Keyword">if</span> (day <span class="Keyword">===</span> bingo_day) {
go_to_bingo();
go_dancing();
}
} <span class="Keyword">else</span> <span class="Keyword">if</span> (day <span class="Keyword">===</span> <span class="String"><span class="String">&quot;</span>Sunday<span class="String">&quot;</span></span>) {
go_to_church();
} <span class="Keyword">else</span> {