source: Dev/trunk/src/client/dojox/lang/functional/sequence.js

define(["dojo/_base/kernel", "dojo/_base/lang", "./lambda"], function(kernel, lang, df){

// This module adds high-level functions and related constructs:
//      - sequence generators

// If you want more general sequence builders check out listcomp.js and
// unfold() (in fold.js).

// Defined methods:
//      - take any valid lambda argument as the functional argument

        lang.mixin(df, {
                // sequence generators
                repeat: function(/*Number*/ n, /*Function|String|Array*/ f, /*Object*/ z, /*Object?*/ o){
                        // summary:
                        //              builds an array by repeatedly applying a unary function N times
                        //              with a seed value Z. N should be greater than 0.
                        o = o || kernel.global; f = df.lambda(f);
                        var t = new Array(n), i = 1;
                        t[0] = z;
                        for(; i < n; t[i] = z = f.call(o, z), ++i);
                        return t;       // Array
                },
                until: function(/*Function|String|Array*/ pr, /*Function|String|Array*/ f, /*Object*/ z, /*Object?*/ o){
                        // summary:
                        //              builds an array by repeatedly applying a unary function with
                        //              a seed value Z until the predicate is satisfied.
                        o = o || kernel.global; f = df.lambda(f); pr = df.lambda(pr);
                        var t = [];
                        for(; !pr.call(o, z); t.push(z), z = f.call(o, z));
                        return t;       // Array
                }
        });
        
        return df;
});