Method: JS::Object#to_f

Defined in:
ext/js/js-core.c

#to_f ⇒ Float

Converts self to a Float:

JS.eval("return 1").to_f         # => 1.0
JS.eval("return 1.2").to_f       # => 1.2
JS.eval("return -1.2").to_f      # => -1.2
JS.eval("return '3.14'").to_f    # => 3.14
JS.eval("return ''").to_f        # => 0.0
JS.eval("return 'x'").to_f       # => 0.0
JS.eval("return NaN").to_f       # => Float::NAN
JS.eval("return Infinity").to_f  # => Float::INFINITY
JS.eval("return -Infinity").to_f # => -Float::INFINITY

Returns:



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# File 'ext/js/js-core.c', line 418

static VALUE _rb_js_obj_to_f(VALUE obj) {
  struct jsvalue *p = check_jsvalue(obj);
  rb_js_abi_host_raw_integer_t ret;
  VALUE result;
  rb_js_abi_host_js_value_to_integer(p->abi, &ret);
  if (ret.tag == RB_JS_ABI_HOST_RAW_INTEGER_AS_FLOAT) {
    result = rb_float_new(ret.val.as_float);
  } else {
    result = DBL2NUM(rb_cstr_to_dbl((const char *)ret.val.bignum.ptr, FALSE));
  }
  rb_js_abi_host_raw_integer_free(&ret);
  return result;
}