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authormensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
committermensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
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New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit
git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
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+if(!dojo._hasResource["dojox.lang.functional.scan"]){ //_hasResource checks added by build. Do not use _hasResource directly in your code.
+dojo._hasResource["dojox.lang.functional.scan"] = true;
+dojo.provide("dojox.lang.functional.scan");
+
+dojo.require("dojox.lang.functional.lambda");
+
+// This module adds high-level functions and related constructs:
+// - "scan" family of functions
+
+// Notes:
+// - missing high-level functions are provided with the compatible API:
+// scanl, scanl1, scanr, scanr1
+
+// Defined methods:
+// - take any valid lambda argument as the functional argument
+// - operate on dense arrays
+// - take a string as the array argument
+// - take an iterator objects as the array argument (only scanl, and scanl1)
+
+(function(){
+ var d = dojo, df = dojox.lang.functional;
+
+ d.mixin(df, {
+ // classic reduce-class functions
+ scanl: function(/*Array|String|Object*/ a, /*Function|String|Array*/ f, /*Object*/ z, /*Object?*/ o){
+ // summary: repeatedly applies a binary function to an array from left
+ // to right using a seed value as a starting point; returns an array
+ // of values produced by foldl() at that point.
+ if(typeof a == "string"){ a = a.split(""); }
+ o = o || d.global; f = df.lambda(f);
+ var t, n;
+ if(d.isArray(a)){
+ t = new Array((n = a.length) + 1);
+ t[0] = z;
+ for(var i = 0; i < n; z = f.call(o, z, a[i], i, a), t[++i] = z);
+ }else{
+ t = [z];
+ for(var i = 0; a.hasNext(); t.push(z = f.call(o, z, a.next(), i++)));
+ }
+ return t; // Array
+ },
+ scanl1: function(/*Array|String|Object*/ a, /*Function|String|Array*/ f, /*Object?*/ o){
+ // summary: repeatedly applies a binary function to an array from left
+ // to right; returns an array of values produced by foldl1() at that
+ // point.
+ if(typeof a == "string"){ a = a.split(""); }
+ o = o || d.global; f = df.lambda(f);
+ var t, n, z;
+ if(d.isArray(a)){
+ t = new Array(n = a.length);
+ t[0] = z = a[0];
+ for(var i = 1; i < n; t[i] = z = f.call(o, z, a[i], i, a), ++i);
+ }else if(a.hasNext()){
+ t = [z = a.next()];
+ for(var i = 1; a.hasNext(); t.push(z = f.call(o, z, a.next(), i++)));
+ }
+ return t; // Array
+ },
+ scanr: function(/*Array|String*/ a, /*Function|String|Array*/ f, /*Object*/ z, /*Object?*/ o){
+ // summary: repeatedly applies a binary function to an array from right
+ // to left using a seed value as a starting point; returns an array
+ // of values produced by foldr() at that point.
+ if(typeof a == "string"){ a = a.split(""); }
+ o = o || d.global; f = df.lambda(f);
+ var n = a.length, t = new Array(n + 1);
+ t[n] = z;
+ for(var i = n; i > 0; --i, z = f.call(o, z, a[i], i, a), t[i] = z);
+ return t; // Array
+ },
+ scanr1: function(/*Array|String*/ a, /*Function|String|Array*/ f, /*Object?*/ o){
+ // summary: repeatedly applies a binary function to an array from right
+ // to left; returns an array of values produced by foldr1() at that
+ // point.
+ if(typeof a == "string"){ a = a.split(""); }
+ o = o || d.global; f = df.lambda(f);
+ var n = a.length, t = new Array(n), z = a[n - 1];
+ t[n - 1] = z;
+ for(var i = n - 1; i > 0; --i, z = f.call(o, z, a[i], i, a), t[i] = z);
+ return t; // Array
+ }
+ });
+})();
+
+}