Add for_each

README.md

@@ -95,6 +95,11 @@ Zap.chunk(['a', 'b', 'c', 4], 2) # [['a', 'b'], ['c', 4]]
   ```crystal
   Zap.flattenDeep([1, [2, [3, [4]], 5]]) # [1, 2, 3, 4, 5]
   ```
+* `for_each(array, func)` - Iterates over elements of collection and invokes function for each element
+
+  ```crystal
+  Zap.for_each([1, 2, 3], ->(element: Int32, index: Int32) { puts element }) # Prints 1, 2, 3
+   ```
 
 * `head(array)` - Gets the first element of array
 

spec/zap_spec.cr

@@ -49,6 +49,13 @@ describe Zap do
     Zap.filter([1, 2, 3], ->(element : Int32, index : Int32) { element > 3 }).should eq([] of Int32)
   end
 
+  it "@for_each" do
+    test = 0
+
+    Zap.for_each([1, 2, 3], ->(element : Int32, index : Int32) { test += 1 })
+    test.should eq(3)
+  end
+
   it "@flatten" do
     # __⚠️ Broken__
     # Zap.flatten([1, 2]).should eq([1, 2])

src/zap.cr

@@ -310,7 +310,8 @@ module Zap
   def flat_map_depth
   end
 
-  def for_each
+  def for_each(array, func)
+    array.each_with_index { |value, index| func.call(value, index) }
   end
 
   def for_each_right