@foo ||= bar
becomes
@foo || @foo = bar
@foo += bar
becomes
@foo = @foo + bar
Dispatch enter and leave events for InstanceVariableAndWriteNode nodes and continue walking the tree.
Dispatch enter and leave events for InstanceVariableOperatorWriteNode nodes and continue walking the tree.
Dispatch enter and leave events for InstanceVariableOrWriteNode nodes and continue walking the tree.
Inspect a InstanceVariableAndWriteNode node.
Inspect a InstanceVariableOperatorWriteNode node.
Inspect a InstanceVariableOrWriteNode node.
Copy a InstanceVariableAndWriteNode node
Copy a InstanceVariableOperatorWriteNode node
Copy a InstanceVariableOrWriteNode node
Returns the original source code as an array of lines.
Note that this is an API for ruby internal use, debugging, and research. Do not use this for any other purpose. The compatibility is not guaranteed.
Implement the hash pattern matching interface for Result.
Ensures the root of chain has a trusted certificate in trust_dir and the digests of the two certificates match according to digester
Add a certificate to trusted certificate list.
Returns the index of the last element for which object == element.
When argument object is given but no block, returns the index of the last such element found:
a = [:foo, 'bar', 2, 'bar'] a.rindex('bar') # => 3
Returns nil if no such object found.
When a block is given but no argument, calls the block with each successive element; returns the index of the last element for which the block returns a truthy value:
a = [:foo, 'bar', 2, 'bar'] a.rindex {|element| element == 'bar' } # => 3
Returns nil if the block never returns a truthy value.
When neither an argument nor a block is given, returns a new Enumerator:
a = [:foo, 'bar', 2, 'bar'] e = a.rindex e # => #<Enumerator: [:foo, "bar", 2, "bar"]:rindex> e.each {|element| element == 'bar' } # => 3
Related: index.
When no block given, returns a new Array new_array of size self.size whose elements are Arrays.
Each nested array new_array[n] is of size other_arrays.size+1, and contains:
The nth element of self.
The nth element of each of the other_arrays.
If all other_arrays and self are the same size:
a = [:a0, :a1, :a2, :a3] b = [:b0, :b1, :b2, :b3] c = [:c0, :c1, :c2, :c3] d = a.zip(b, c) d # => [[:a0, :b0, :c0], [:a1, :b1, :c1], [:a2, :b2, :c2], [:a3, :b3, :c3]]
If any array in other_arrays is smaller than self, fills to self.size with nil:
a = [:a0, :a1, :a2, :a3] b = [:b0, :b1, :b2] c = [:c0, :c1] d = a.zip(b, c) d # => [[:a0, :b0, :c0], [:a1, :b1, :c1], [:a2, :b2, nil], [:a3, nil, nil]]
If any array in other_arrays is larger than self, its trailing elements are ignored:
a = [:a0, :a1, :a2, :a3] b = [:b0, :b1, :b2, :b3, :b4] c = [:c0, :c1, :c2, :c3, :c4, :c5] d = a.zip(b, c) d # => [[:a0, :b0, :c0], [:a1, :b1, :c1], [:a2, :b2, :c2], [:a3, :b3, :c3]]
If an argument is not an array, it extracts the values by calling each:
a = [:a0, :a1, :a2, :a2] b = 1..4 c = a.zip(b) c # => [[:a0, 1], [:a1, 2], [:a2, 3], [:a2, 4]]
When a block is given, calls the block with each of the sub-arrays (formed as above); returns nil:
a = [:a0, :a1, :a2, :a3] b = [:b0, :b1, :b2, :b3] c = [:c0, :c1, :c2, :c3] a.zip(b, c) {|sub_array| p sub_array} # => nil
Output:
[:a0, :b0, :c0] [:a1, :b1, :c1] [:a2, :b2, :c2] [:a3, :b3, :c3]
Transposes the rows and columns in an Array of Arrays; the nested Arrays must all be the same size:
a = [[:a0, :a1], [:b0, :b1], [:c0, :c1]] a.transpose # => [[:a0, :b0, :c0], [:a1, :b1, :c1]]
Returns elements from self; does not modify self.
When no argument is given, returns the first element:
a = [:foo, 'bar', 2] a.first # => :foo a # => [:foo, "bar", 2]
If self is empty, returns nil.
When non-negative Integer argument n is given, returns the first n elements in a new Array:
a = [:foo, 'bar', 2] a.first(2) # => [:foo, "bar"]
If n >= array.size, returns all elements:
a = [:foo, 'bar', 2] a.first(50) # => [:foo, "bar", 2]
If n == 0 returns an new empty Array:
a = [:foo, 'bar', 2] a.first(0) # []
Related: last.
Returns elements from self; self is not modified.
When no argument is given, returns the last element:
a = [:foo, 'bar', 2] a.last # => 2 a # => [:foo, "bar", 2]
If self is empty, returns nil.
When non-negative Integer argument n is given, returns the last n elements in a new Array:
a = [:foo, 'bar', 2] a.last(2) # => ["bar", 2]
If n >= array.size, returns all elements:
a = [:foo, 'bar', 2] a.last(50) # => [:foo, "bar", 2]
If n == 0, returns an new empty Array:
a = [:foo, 'bar', 2] a.last(0) # []
Related: first.