40 lines
1.3 KiB
JavaScript
40 lines
1.3 KiB
JavaScript
//>>built
|
|
define("dojox/lang/functional/sequence", ["dojo/_base/lang", "./lambda"], function(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
|
|
|
|
/*=====
|
|
var df = dojox.lang.functional;
|
|
=====*/
|
|
|
|
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 || dojo.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 || dojo.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;
|
|
});
|