Removing some unnecessary invocation parens

chapters/arrays/concatenating-arrays.md

@@ -14,7 +14,7 @@ Use JavaScript's Array concat() method:
 {% highlight coffeescript %}
 ray1 = [1,2,3]
 ray2 = [4,5,6]
-ray3 = ray1.concat(ray2)
+ray3 = ray1.concat ray2
 # => [1, 2, 3, 4, 5, 6]
 {% endhighlight %}
 

chapters/arrays/max-array-value.md

@@ -13,7 +13,7 @@ In ECMAScript 5, use `Array#reduce`. In older javascripts, use Math.max over a l
 
 {% highlight coffeescript %}
 # ECMAScript 5
-[12,32,11,67,1,3].reduce (a,b) -> Math.max(a,b)
+[12,32,11,67,1,3].reduce (a,b) -> Math.max a, b
 # => 67
 
 # Pre-EC5

chapters/math/fast-fibonacci.md

@@ -52,8 +52,8 @@ fib_bits = (n) ->
 
 	bits = []
 	while n > 0
-    	[n, bit] = divmodBasic(n, 2)
-    	bits.push(bit)
+    	[n, bit] = divmodBasic n, 2
+    	bits.push bit
 
   	bits.reverse()
   	return bits
@@ -67,7 +67,7 @@ fibFast = (n) ->
 
 	[a, b, c] = [1, 0, 1]
 
-	for bit in fib_bits(n)
+	for bit in fib_bits n
 	    if bit
 	    	[a, b] = [(a+c)*b, b*b + c*c]
 	    else
@@ -88,12 +88,12 @@ divmodBasic = (x, y) ->
 	Burnikel / Ziegler _if_ possible...
 	###
 
-	return [(q = Math.floor(x/y)), (r = if x < y then x else x % y)]
+	return [(q = Math.floor x/y), (r = if x < y then x else x % y)]
 
 start = (new Date).getTime();
 calc_value = fibFast(MAXIMUM_JS_FIB_N)
 diff = (new Date).getTime() - start;
-console.log("[#{calc_value}] took #{diff} ms.")
+console.log "[#{calc_value}] took #{diff} ms."
 {% endhighlight %}
 
 ## Discussion

chapters/metaprogramming/detecting-and-replacing-functions.md

@@ -14,7 +14,7 @@ Use `::` to detect the function, and assign to it if it does not exist.
 {% highlight coffeescript %}
 unless Array::filter
   Array::filter = (callback) ->
-    element for element in this when callback(element)
+    element for element in this when callback element
 
 array = [1..10]
 

chapters/strings/finding-substrings.md

@@ -10,18 +10,18 @@ You need to find the first or last occurrence of a search string within a messag
 ## Solution
 
 Use Javascript's indexOf() and lastIndexOf() to find the first and last occurrences of a string, respectively.
-Syntax: string.indexOf(searchstring, start)
+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)
+message.indexOf "This", 0
 # => 0
 
 # Modifying the start parameter
-message.indexOf("This",5)
+message.indexOf "This", 5
 # => 23
 
-message.lastIndexOf("This")
+message.lastIndexOf "This"
 # => 49
 
 {% endhighlight %}

chapters/strings/repeating.md

@@ -13,7 +13,7 @@ Create an array of n+1 nulls, and then join it with the repetition string as the
 
 {% highlight coffeescript %}
 # create a string of 10 foos
-Array(11).join('foo')
+Array(11).join 'foo'
 
 # => "foofoofoofoofoofoofoofoofoofoo"
 {% endhighlight %}