method

concat

v1_8_7_72 - Show latest stable - Class: Array

concat(p1)

public

Appends the elements in other_array to self.

   [ "a", "b" ].concat( ["c", "d"] ) #=> [ "a", "b", "c", "d" ]

/* 
 *  call-seq:
 *     array.concat(other_array)   ->  array
 *
 *  Appends the elements in other_array to _self_.
 *  
 *     [ "a", "b" ].concat( ["c", "d"] ) #=> [ "a", "b", "c", "d" ]
 */


VALUE
rb_ary_concat(x, y)
    VALUE x, y;
{
    y = to_ary(y);
    if (RARRAY(y)->len > 0) {
        rb_ary_splice(x, RARRAY(x)->len, 0, y);
    }
    return x;
}

1Note

Changes self

amasses · May 3, 20102 thanks

This method changes the object/array the method is called on. For example:

a = ["a", "b", "c"]
b = ["x", "y", "z"]

a.concat(b)  #=> [a", "b", "c", "z", "y", "z"]
a #=> [a", "b", "c", "z", "y", "z"]

In this example the object A is modified, the method modifies the object, then returns the new object.

concat

1Note

Changes self

Related methods