Finding substrings from wanted-recipes started, other fixes

Author: AaronW

chapters/math/radians-degrees.textile

@@ -20,7 +20,7 @@ radiansToDegrees = (radians) ->
 radiansToDegrees(1)
 # => 57.29577951308232
 
-# To convert from degrees to radians (Answer is for 1)
+# To convert from degrees to radians
 degreesToRadians = (degrees) ->
     radians = degrees * Math.PI / 180
 

chapters/strings/finding-substrings.textile

@@ -0,0 +1,32 @@
+---
+layout: recipe
+title: Finding Substrings
+chapter: Strings
+---
+
+h2. Problem
+
+You need to find the first or last occurrence of a search string within a message.
+
+h2. Solution
+
+Use Javascript's indexOf() and lastIndexOf() to find the first and last occurrences of a string, respectively.
+Syntax: string.indexOf(searchstring, start)
+
+{% highlight coffeescript %}
+message = "This is a test string. This has a repeat or two. This might even have a third."
+message.indexOf("This",0)
+# => 0
+
+# Modifying the start parameter
+message.indexOf("This",5)
+# => 23
+
+message.lastIndexOf("This")
+# => 49
+
+{% endhighlight %}
+
+h2. Discussion
+
+Still need recipe to count occurrences of a given string within a message.

wanted-recipes.textile

@@ -19,7 +19,6 @@ h2. Objects
 
 h2. Strings
 
-* Find a substring in a string  # not by regex! JS indexOf(), lastIndexOf()
 * HTML methods # JS .sup(), .sub(), .blink(), .link(url), etc. May not exist in your JS impl!
 * Splitting a string # JS "foo bar baz".split ' ' # => [ 'foo', 'bar', 'baz' ]
 * substr # str.substr(x,y)  === str[x..x+y-1] === str[x...x+y]