Class: SymbolHash

### Home Classes Methods

### In Files

- lib/yard/core_ext/symbol_hash.rb

### Parent

Hash

### Methods

- ::[]
- ::new
- #[]
- #[]=
- #delete
- #has_key?
- #merge
- #merge!
- #update

### Files

- LICENSE.txt
- MIT.txt

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- SymbolHash

No matching classes.

# SymbolHash

A subclass of Hash where all keys are converted into Symbols, and optionally, all String values are converted into Symbols.

### Public Class Methods

[](*hsh) click to toggle source

@overload [](hash)

    Creates a SymbolHash object from an existing Hash

    @example
      SymbolHash['x' => 1, :y => 2] # => #<SymbolHash:0x...>
    @param [Hash] hash the hash object
    @return [SymbolHash] a new SymbolHash from a hash object

@overload [](*list)

    Creates a SymbolHash from an even list of keys and values

    @example
      SymbolHash[key1, value1, key2, value2, ...]
    @param [Array] list an even list of key followed by value
    @return [SymbolHash] a new SymbolHash object

    # File lib/yard/core_ext/symbol_hash.rb, line 27
    def self.[](*hsh)
      obj = new;
      if hsh.size == 1 && hsh.first.is_a?(Hash)
        hsh.first.each {|k,v| obj[k] = v }
      else
        0.step(hsh.size, 2) {|n| obj[hsh[n]] = hsh[n+1] }
      end
      obj
    end

new(symbolize_value = true) click to toggle source

Creates a new SymbolHash object

@param [Boolean] symbolize_value converts any String values into Symbols

    if this is set to +true+.

    # File lib/yard/core_ext/symbol_hash.rb, line 8
    def initialize(symbolize_value = true)
      @symbolize_value = symbolize_value
    end

### Public Instance Methods

[](key) click to toggle source

Accessed a symbolized key @param [to_sym] key the key to access @return [Object] the value associated with the key

    # File lib/yard/core_ext/symbol_hash.rb, line 48
    def [](key) super(key.to_sym) end

[]=(key, value) click to toggle source

Assigns a value to a symbolized key @param [to_sym] key the key @param [Object] value the value to be assigned. If this is a String and

    values are set to be symbolized, it will be converted into a Symbol.

    # File lib/yard/core_ext/symbol_hash.rb, line 41
    def []=(key, value)
      super(key.to_sym, value.instance_of?(String) && @symbolize_value ? value.to_sym : value)
    end

delete(key) click to toggle source

Deleted a key and value associated with it @param [to_sym] key the key to delete @return [void]

    # File lib/yard/core_ext/symbol_hash.rb, line 53
    def delete(key) super(key.to_sym) end

has_key?(key) click to toggle source

Tests if a symbolized key exists @param [to_sym] key the key to test @return [Boolean] whether the key exists

    # File lib/yard/core_ext/symbol_hash.rb, line 58
    def has_key?(key) super(key.to_sym) end

merge(hash) click to toggle source

Merges the contents of another hash into a new SymbolHash object

@param [Hash] hash the hash of objects to copy @return [SymbolHash] a new SymbolHash containing the merged data

    # File lib/yard/core_ext/symbol_hash.rb, line 72
    def merge(hash) dup.merge!(hash) end

merge!(hash) click to toggle source
Alias for: update
update(hash) click to toggle source

Updates the object with the contents of another Hash object. This method modifies the original SymbolHash object

@param [Hash] hash the hash object to copy the values from @return [SymbolHash] self

    # File lib/yard/core_ext/symbol_hash.rb, line 65
    def update(hash) hash.each {|k,v| self[k] = v }; self end

Also aliased as: merge!

[Validate]

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