method

reject!

v1_8_7_330 - Show latest stable - 0 notes - Class: Array

reject!() public

Equivalent to Array#delete_if, deleting elements from self for which the block evaluates to true, but returns nil if no changes were made. Also see Enumerable#reject.

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/*
 *  call-seq:
 *     array.reject! {|item| block }  -> array or nil
 *  
 *  Equivalent to <code>Array#delete_if</code>, deleting elements from
 *  _self_ for which the block evaluates to true, but returns
 *  <code>nil</code> if no changes were made. Also see
 *  <code>Enumerable#reject</code>.
 */

static VALUE
rb_ary_reject_bang(ary)
    VALUE ary;
{
    long i1, i2;

    RETURN_ENUMERATOR(ary, 0, 0);
    rb_ary_modify(ary);
    for (i1 = i2 = 0; i1 < RARRAY(ary)->len; i1++) {
        VALUE v = RARRAY(ary)->ptr[i1];
        if (RTEST(rb_yield(v))) continue;
        if (i1 != i2) {
            rb_ary_store(ary, i2, v);
        }
        i2++;
    }
    if (RARRAY(ary)->len == i2) return Qnil;
    if (i2 < RARRAY(ary)->len)
        RARRAY(ary)->len = i2;

    return ary;
}

reject!

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