root / trunk / web / dojo / dojox / lang / functional / scan.js @ 13
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/*
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Copyright (c) 2004-2010, The Dojo Foundation All Rights Reserved.
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Available via Academic Free License >= 2.1 OR the modified BSD license.
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see: http://dojotoolkit.org/license for details
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*/
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if(!dojo._hasResource["dojox.lang.functional.scan"]){ |
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dojo._hasResource["dojox.lang.functional.scan"]=true; |
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dojo.provide("dojox.lang.functional.scan");
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dojo.require("dojox.lang.functional.lambda");
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(function(){
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var d=dojo,df=dojox.lang.functional,_1={};
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d.mixin(df,{scanl:function(a,f,z,o){
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if(typeof a=="string"){ |
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a=a.split("");
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} |
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o=o||d.global; |
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f=df.lambda(f); |
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var t,n,i;
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if(d.isArray(a)){
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t=new Array((n=a.length)+1); |
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t[0]=z;
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for(i=0;i<n;z=f.call(o,z,a[i],i,a),t[++i]=z){ |
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} |
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}else{
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if(typeof a.hasNext=="function"&&typeof a.next=="function"){ |
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t=[z]; |
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for(i=0;a.hasNext();t.push(z=f.call(o,z,a.next(),i++,a))){ |
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} |
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}else{
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t=[z]; |
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for(i in a){ |
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if(!(i in _1)){ |
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t.push(z=f.call(o,z,a[i],i,a)); |
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} |
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} |
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} |
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} |
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return t;
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},scanl1:function(a,f,o){ |
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if(typeof a=="string"){ |
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a=a.split("");
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} |
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o=o||d.global; |
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f=df.lambda(f); |
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var t,n,z,_2=true; |
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if(d.isArray(a)){
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t=new Array(n=a.length);
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t[0]=z=a[0]; |
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for(var i=1;i<n;t[i]=z=f.call(o,z,a[i],i,a),++i){ |
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} |
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}else{
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if(typeof a.hasNext=="function"&&typeof a.next=="function"){ |
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if(a.hasNext()){
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t=[z=a.next()]; |
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for(var i=1;a.hasNext();t.push(z=f.call(o,z,a.next(),i++,a))){ |
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} |
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} |
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}else{
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for(var i in a){ |
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if(!(i in _1)){ |
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if(_2){
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t=[z=a[i]]; |
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_2=false;
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}else{
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t.push(z=f.call(o,z,a[i],i,a)); |
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} |
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} |
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} |
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} |
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} |
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return t;
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},scanr:function(a,f,z,o){ |
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if(typeof a=="string"){ |
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a=a.split("");
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} |
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o=o||d.global; |
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f=df.lambda(f); |
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var n=a.length,t=new Array(n+1),i=n; |
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t[n]=z; |
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for(;i>0;--i,z=f.call(o,z,a[i],i,a),t[i]=z){ |
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} |
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return t;
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},scanr1:function(a,f,o){ |
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if(typeof a=="string"){ |
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a=a.split("");
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} |
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o=o||d.global; |
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f=df.lambda(f); |
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var n=a.length,t=new Array(n),z=a[n-1],i=n-1; |
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t[i]=z; |
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for(;i>0;--i,z=f.call(o,z,a[i],i,a),t[i]=z){ |
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} |
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return t;
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}}); |
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})(); |
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} |