root / trunk / web / dojo / dojox / lang / functional / scan.js @ 11
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| 1 | 9 | andrej.cim | /*
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| 2 | Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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| 3 | Available via Academic Free License >= 2.1 OR the modified BSD license.
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| 4 | see: http://dojotoolkit.org/license for details
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| 5 | */
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| 6 | |||
| 7 | |||
| 8 | if(!dojo._hasResource["dojox.lang.functional.scan"]){ |
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| 9 | dojo._hasResource["dojox.lang.functional.scan"]=true; |
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| 10 | dojo.provide("dojox.lang.functional.scan");
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| 11 | dojo.require("dojox.lang.functional.lambda");
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| 12 | (function(){
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| 13 | var d=dojo,df=dojox.lang.functional,_1={};
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| 14 | d.mixin(df,{scanl:function(a,f,z,o){
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| 15 | if(typeof a=="string"){ |
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| 16 | a=a.split("");
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| 17 | } |
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| 18 | o=o||d.global; |
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| 19 | f=df.lambda(f); |
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| 20 | var t,n,i;
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| 21 | if(d.isArray(a)){
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| 22 | t=new Array((n=a.length)+1); |
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| 23 | t[0]=z;
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| 24 | for(i=0;i<n;z=f.call(o,z,a[i],i,a),t[++i]=z){ |
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| 25 | } |
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| 26 | }else{
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| 27 | if(typeof a.hasNext=="function"&&typeof a.next=="function"){ |
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| 28 | t=[z]; |
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| 29 | for(i=0;a.hasNext();t.push(z=f.call(o,z,a.next(),i++,a))){ |
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| 30 | } |
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| 31 | }else{
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| 32 | t=[z]; |
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| 33 | for(i in a){ |
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| 34 | if(!(i in _1)){ |
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| 35 | t.push(z=f.call(o,z,a[i],i,a)); |
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| 36 | } |
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| 37 | } |
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| 38 | } |
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| 39 | } |
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| 40 | return t;
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| 41 | },scanl1:function(a,f,o){ |
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| 42 | if(typeof a=="string"){ |
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| 43 | a=a.split("");
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| 44 | } |
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| 45 | o=o||d.global; |
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| 46 | f=df.lambda(f); |
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| 47 | var t,n,z,_2=true; |
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| 48 | if(d.isArray(a)){
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| 49 | t=new Array(n=a.length);
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| 50 | t[0]=z=a[0]; |
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| 51 | for(var i=1;i<n;t[i]=z=f.call(o,z,a[i],i,a),++i){ |
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| 52 | } |
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| 53 | }else{
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| 54 | if(typeof a.hasNext=="function"&&typeof a.next=="function"){ |
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| 55 | if(a.hasNext()){
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| 56 | t=[z=a.next()]; |
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| 57 | for(var i=1;a.hasNext();t.push(z=f.call(o,z,a.next(),i++,a))){ |
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| 58 | } |
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| 59 | } |
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| 60 | }else{
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| 61 | for(var i in a){ |
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| 62 | if(!(i in _1)){ |
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| 63 | if(_2){
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| 64 | t=[z=a[i]]; |
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| 65 | _2=false;
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| 66 | }else{
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| 67 | t.push(z=f.call(o,z,a[i],i,a)); |
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| 68 | } |
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| 69 | } |
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| 70 | } |
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| 71 | } |
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| 72 | } |
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| 73 | return t;
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| 74 | },scanr:function(a,f,z,o){ |
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| 75 | if(typeof a=="string"){ |
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| 76 | a=a.split("");
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| 77 | } |
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| 78 | o=o||d.global; |
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| 79 | f=df.lambda(f); |
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| 80 | var n=a.length,t=new Array(n+1),i=n; |
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| 81 | t[n]=z; |
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| 82 | for(;i>0;--i,z=f.call(o,z,a[i],i,a),t[i]=z){ |
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| 83 | } |
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| 84 | return t;
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| 85 | },scanr1:function(a,f,o){ |
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| 86 | if(typeof a=="string"){ |
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| 87 | a=a.split("");
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| 88 | } |
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| 89 | o=o||d.global; |
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| 90 | f=df.lambda(f); |
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| 91 | var n=a.length,t=new Array(n),z=a[n-1],i=n-1; |
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| 92 | t[i]=z; |
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| 93 | for(;i>0;--i,z=f.call(o,z,a[i],i,a),t[i]=z){ |
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| 94 | } |
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| 95 | return t;
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| 96 | }}); |
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| 97 | })(); |
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| 98 | } |