method

===

v1_8_7_330 - Show latest stable - 1 note - Class: Regexp

===(p1) public

Case Equality—Synonym for Regexp#=~ used in case statements.

a = "HELLO"
case a
when /^[a-z]*$/; print "Lower case\n"
when /^[A-Z]*$/; print "Upper case\n"
else;            print "Mixed case\n"
end

produces:

Upper case

Show source

/*
 *  call-seq:
 *     rxp === str   => true or false
 *  
 *  Case Equality---Synonym for <code>Regexp#=~</code> used in case statements.
 *     
 *     a = "HELLO"
 *     case a
 *     when /^[a-z]*$/; print "Lower case\n"
 *     when /^[A-Z]*$/; print "Upper case\n"
 *     else;            print "Mixed case\n"
 *     end
 *     
 *  <em>produces:</em>
 *     
 *     Upper case
 */

VALUE
rb_reg_eqq(re, str)
    VALUE re, str;
{
    long start;

    if (TYPE(str) != T_STRING) {
        str = rb_check_string_type(str);
        if (NIL_P(str)) {
            rb_backref_set(Qnil);
            return Qfalse;
        }
    }
    StringValue(str);
    start = rb_reg_search(re, str, 0, 0);
    if (start < 0) {
        return Qfalse;
    }
    return Qtrue;
}

January 4, 2016 - (>= v1_9_3_392)

0 thanks

Also implemented by other classes

It’s worth noting that this method is also implemented by other classes like Proc, Range and even String.

Most of these are missing proper examples, but you can find some useful examples here:

http://www.blackbytes.info/2015/10/ruby-case/

===

Related methods

Also implemented by other classes