count_chars

  • There is no direct equivalent to count information about characters within a string, but we can achieve similar results using:

    1. String#split the string on each character
    2. Array#inject to build a hash based on the occurrence of characters

    PHP

    $result = count_chars("test", 1);
var_export($result);
// => array(101 => 1, 115 => 1, 116 => 2)

    Ruby

    # direct equivalent
result = "test".split("").inject({}) do |hash, val|
  hash[val[0]] = hash[val[0]].to_i + 1
  hash
end
p result
# => {115=>1, 116=>2, 101=>1}

    If all we need is know how many times a specific character occurs within the string:

    PHP

    $chars = count_chars("hello world", 1); 
print $chars[ord('l')];
// => 3

    Ruby

    # number of times a single char occurs
puts "hello world".scan("l").length
# => 3

    see also

← count crc32 →

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