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instance method

String#include?

str.include? other_str → true or false

static VALUE
rb_str_include(VALUE str, VALUE arg)
{
    long i;

    StringValue(arg);
    i = rb_str_index(str, arg, 0);

    if (i == -1) return Qfalse;
    return Qtrue;
}

Returns true if str contains the given string or character.

Example

"hello".include? "lo"   #=> true
"hello".include? "ol"   #=> false
"hello".include? ?h     #=> true

See also #hex #index #hash #initialize_copy also in 4.1 · 4.0 · 3.4 · 3.3 · 3.2 · 3.1

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