Thanks for the quick reply. I ran some tests in ruby:
array = [1,2,3,4] p array.insert(-3, 'one', 'two') array = [1,2,3,4] p array.insert(-1, 'one', 'two') array = [1,2,3,4] p array.insert(0, 'one', 'two') array = [1,2,3,4] p array.insert(1, 'one', 'two') array = [1,2,3,4] p array.insert(10, 'one', 'two') output: [1, 2, "one", "two", 3, 4] [1, 2, 3, 4, "one", "two"] ["one", "two", 1, 2, 3, 4] [1, "one", "two", 2, 3, 4] [1, 2, 3, 4, nil, nil, nil, nil, nil, nil, "one", "two"] when the index is negative and of greater length than the array, ruby throws an index out of bounds exception. On Mar 27, 4:06 pm, Ken Snyder <[EMAIL PROTECTED]> wrote: > koozdra wrote: > > I propose the addition of Array.insert(index, insertee [,...]). This > > method would would be like Ruby's insert. "Inserts the given values > > before the element with the given index" > > -http://www.ruby-doc.org/core/classes/Array.html#M002195 > > > var a = ['a','b','c','d'] > > > a.insert(2, 33) > > --> ['a','b',33,'c','d'] > > > a.insert(3, 'one', 'two', 'three') > > -->['a','b','c','one', 'two', 'three','d'] > > > -- > > Dimitri > > I always have mixed feelings about wrappers for Array#splice. It is a > very powerful method that needs no knock off, yet it is very hard to > remember. Anyhow, below is an academic stab at implementing your idea. > My only question is what to do when the index is too low or too high. > I'm not sure what Ruby does; the code below just defaults to 0 when the > index is too low or too high. > > - Ken Snyder > > Array.prototype.insert = function() { > var args = $A(arguments), index = args.shift(); > index = index < 0 ? this[this.length - index] : index; > args = [(this[index] === undefined ? 0 : index), 0].concat(args); > Array.prototype.splice.apply(this, args); > > } > > var a = ['a','b','c','d']; > a.insert(2, 33); > console.log(a); > // ["a", "b", 33, "c", "d"] --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Prototype: Core" group. To post to this group, send email to prototype-core@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/prototype-core?hl=en -~----------~----~----~----~------~----~------~--~---
