Method not available on this version
This method is only available on newer versions. The first available version of the method is shown here.
one?(*args)
public
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static VALUE
rb_ary_one_p(int argc, VALUE *argv, VALUE ary)
{
long i, len = RARRAY_LEN(ary);
VALUE result = Qfalse;
rb_check_arity(argc, 0, 1);
if (!len) return Qfalse;
if (argc) {
if (rb_block_given_p()) {
rb_warn("given block not used");
}
for (i = 0; i < RARRAY_LEN(ary); ++i) {
if (RTEST(rb_funcall(argv[0], idEqq, 1, RARRAY_AREF(ary, i)))) {
if (result) return Qfalse;
result = Qtrue;
}
}
}
else if (!rb_block_given_p()) {
for (i = 0; i < len; ++i) {
if (RTEST(RARRAY_AREF(ary, i))) {
if (result) return Qfalse;
result = Qtrue;
}
}
}
else {
for (i = 0; i < RARRAY_LEN(ary); ++i) {
if (RTEST(rb_yield(RARRAY_AREF(ary, i)))) {
if (result) return Qfalse;
result = Qtrue;
}
}
}
return result;
}