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Code Issues Releases Wiki Activity

Refactoring of new filter list operators

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Jermolene 2014-01-25 17:44:36 +00:00
parent 02d3861d7d
commit e6843aabff
1 changed files with 42 additions and 71 deletions
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113
core/modules/filters/listops.js
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@ -3,7 +3,7 @@ title: $:/core/modules/filters/listops.js
type: application/javascript
module-type: filteroperator
Filter operator for manipulating lists
Filter operators for manipulating the current selection list
\*/
(function(){
@ -13,104 +13,75 @@ Filter operator for manipulating lists
"use strict";
/*
Export our filter function
Reverse list
*/
exports.reverse = function(source,operator,options) {
var results = [];
// Iterate through the source tiddlers
if($tw.utils.isArray(source)) {
$tw.utils.each(source,function(title) {
results.unshift(title);
});
} else {
$tw.utils.each(source,function(element,title) {
results.unshift(title);
});
if(!$tw.utils.isArray(source)) {
source = Object.keys(source).sort();
}
$tw.utils.each(source,function(title) {
results.unshift(title);
});
return results;
};
/*
First entry/entries in list
*/
exports.first = function(source,operator,options) {
var results = [];
var count = operator.operand || 1;
// Iterate through the source tiddlers
if($tw.utils.isArray(source)) {
results = source.slice(0, Math.min(count, source.length));
} else {
for(var title in source) {
if(count-- < 1) break;
results.push(title);
};
var count = parseInt(operator.operand) || 1;
if(!$tw.utils.isArray(source)) {
source = Object.keys(source).sort();
}
return results;
return source.slice(0,Math.min(count,source.length));
};
/*
Last entry/entries in list
*/
exports.last = function(source,operator,options) {
var results = [];
var count = operator.operand || 1;
// Iterate through the source tiddlers
if($tw.utils.isArray(source)) {
results = source.slice(-count);
} else {
for(var title in source) {
results.push(title);
};
results = results.slice(-count);
var count = parseInt(operator.operand) || 1;
if(!$tw.utils.isArray(source)) {
source = Object.keys(source).sort();
}
return results;
return source.slice(-count);
};
/*
All but the first entry/entries of the list
*/
exports.rest = function(source,operator,options) {
var results = [];
var count = operator.operand || 1;
// Iterate through the source tiddlers
if($tw.utils.isArray(source)) {
results = source.slice(count);
} else {
for(var title in source) {
if(--count < 0) {
results.push(title);
}
};
var count = parseInt(operator.operand) || 1;
if(!$tw.utils.isArray(source)) {
source = Object.keys(source).sort();
}
return results;
return source.slice(count);
};
exports.butfirst = exports.rest;
exports.bf = exports.rest;
/*
All but the last entry/entries of the list
*/
exports.butlast = function(source,operator,options) {
var results = [];
var count = operator.operand || 1;
// Iterate through the source tiddlers
if($tw.utils.isArray(source)) {
results = source.slice(0,-count);
} else {
for(var title in source) {
results.push(title);
};
results = results.slice(0,-count);
var count = parseInt(operator.operand) || 1;
if(!$tw.utils.isArray(source)) {
source = Object.keys(source).sort();
}
return results;
return source.slice(0,-count);
};
exports.bl = exports.butlast;
/*
The nth member of the list
*/
exports.nth = function(source,operator,options) {
var results = [];
var count = operator.operand || 1;
// Iterate through the source tiddlers
if($tw.utils.isArray(source)) {
results = source.slice(count-1,count);
} else {
for(var title in source) {
--count;
if(count > 0) continue;
if(count < 0) break;
results.push(title);
break;
};
var count = parseInt(operator.operand) || 1;
if(!$tw.utils.isArray(source)) {
source = Object.keys(source).sort();
}
return results;
return source.slice(count-1,count);
};
})();