I hate there is not a "<" method for array object.
Since there is the "<<" for adding an element, why not have the "<" for truncating then filling up the array?
I know I can write one:
irb(main):009:0> class Array
irb(main):010:1> def <(a)
irb(main):011:2> clear
irb(main):012:2> self << a
irb(main):013:2> end
irb(main):014:1> end
Established convention is that << is the "left shift" or "append"
operator, which will change the receiver. On the other hand, < is the
"less than" operator, which simply compares the receiver to the
argument, no change whatsoever.
You *can* redefine < to do whatever you want, but I'm not sure why you
would define it this way.
···
On Nov 25, 10:49 pm, "Eva" <eva54...@sina.com> wrote:
Hi,
I hate there is not a "<" method for array object.
Since there is the "<<" for adding an element, why not have the "<" for truncating then filling up the array?
I know I can write one:
irb(main):009:0> class Array
irb(main):010:1> def <(a)
irb(main):011:2> clear
irb(main):012:2> self << a
irb(main):013:2> end
irb(main):014:1> end