Module: Humidifier::Utils

Defined in:
lib/humidifier/utils.rb,
ext/humidifier/humidifier.c

Overview

Dumps an object to CFN syntax

Class Method Summary collapse

Class Method Details

.enumerable_to_h(enumerable) ⇒ Object

back-supporting ruby 2.0’s lack of Enumerable#to_h



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# File 'lib/humidifier/utils.rb', line 8

def enumerable_to_h(enumerable)
  enumerable.each_with_object({}) do |item, result|
    key, value = yield item
    result[key] = value
  end
end

.underscore(str) ⇒ Object

takes a string and returns a downcased version where capitals are now separated by underscores



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# File 'ext/humidifier/humidifier.c', line 45

static VALUE underscore(VALUE self, VALUE str)
{
  if (TYPE(str) == T_NIL) return Qnil;

  char *str_value = rb_string_value_cstr(&str);
  char orig_str[strlen(str_value) + 1];

  strcpy(orig_str, str_value);
  preprocess(orig_str);

  // manually null-terminating the string because on Fedora for strings of length 16 this breaks otherwise
  orig_str[strlen(str_value)] = '\0';

  char new_str[strlen(orig_str) * 2];
  char prev;
  int orig_idx, new_idx;

  for (orig_idx = 0, new_idx = 0; orig_str[orig_idx] != '\0'; orig_idx++) {
    if (orig_idx != 0 && isupper(orig_str[orig_idx])) {
      new_str[new_idx++] = '_';
    }
    new_str[new_idx++] = tolower(orig_str[orig_idx]);
    prev = tolower(orig_str[orig_idx]);
  }

  return rb_str_new(new_str, new_idx);
}

.underscored(names) ⇒ Object

a frozen hash of the given names mapped to their underscored version



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# File 'lib/humidifier/utils.rb', line 16

def underscored(names)
  names.each_with_object({}) { |name, map| map[name] = underscore(name).to_sym }.freeze
end