/* * call-seq: * num.nonzero? => num or nil * * Returns <i>num</i> if <i>num</i> is not zero, <code>nil</code> * otherwise. This behavior is useful when chaining comparisons: * * a = %w( z Bb bB bb BB a aA Aa AA A ) * b = a.sort {|a,b| (a.downcase <=> b.downcase).nonzero? || a <=> b } * b #=> ["A", "a", "AA", "Aa", "aA", "BB", "Bb", "bB", "bb", "z"] */ static VALUE num_nonzero_p(num) VALUE num; { if (RTEST(rb_funcall(num, rb_intern("zero?"), 0, 0))) { return Qnil; } return num; }