[LG] Need a way to iterate strings

[mdrichardson]

Is your feature request related to a problem? Please describe.

Currently, there is no way to iterate over a string using Language Generation / Common Expression Language. This issue spawns from a StackOverflow question. Basically, they want to be able to pull numbers out of strings, such that:

• "hey 1234" becomes "1234"
• "xyz1234" becomes "1234"

Describe the solution you'd like

Ideally, array() could turn a string into an array, so that it can be iterated over.

Describe alternatives you've considered

Alternatively, split(<string>, <delimiter>) could accept a null or wildcard delimiter, which would just split every character. It looks like that may have been considered.

Additional context

In my own testing, with var test = "hey, 1234",

• array(test) = [ 'hey, 1234' ]
• createArray(test) = [ 'hey, 1234' ]
• split(test, null) = [ 'hey,' '1234']
• split(test, "") = [ 'hey,' '1234']
• split(test, string.Empty) = [ 'hey,' '1234']

[enhancement]

[eduardmartos]

Related with this, another interesting feature will be the ability to create an array of numbers like this:
intarray([start], [end])
intarray(1, 10) => [1,2,3,4,5,6,7,8,9,10]

So we can use foreach in conjunction with this and substring to iterate on each char of the string.
And this could be useful for other scenarios too.

[vishwacsena]

We should support split(str) or split(str, '') to return an array of entire string split.
Also the prebuilt functions doc is missing details for array and the link is broken.

@boydc2014