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[英]How do I alphabetize a list based on the nth letter of each word in js
[英]How do I use AngularJS to alphabetize a contact list with headers as the first character?
我有這樣的清單
一個人
人
APerson2
BPerson
我希望它看起來像這樣
一種
Aperson Aperson2
乙
Bperson
C
人
我在這里找到了一個解釋它的帖子: http : //pmosd.blogspot.com/2013/07/headers-in-angularjs-ng-repeats.html
但是作為Angular菜鳥,我不確定將函數和過濾器放在js文件中的位置以及如何正確地將其編碼到我的html中。 我嘗試關注我鏈接的帖子,但是帶有聯系人姓名的無序列表不會顯示在瀏覽器中。 這是我當前的JS和HTML文件。 我曾嘗試將過濾器和函數放置在不同的地方,但這是我最近的嘗試。
Directory.js:
'use strict';
var myApp = angular.module('myappname');
myApp.controller('DirectoryCtrl', function ($scope) {
$scope.contacts = [{
'fname': 'Randy',
'lname': 'Johnson',
'location': 'Seattle, WA'
}, {
'fname': 'Andy',
'lname': 'Pettite',
'location': 'Bronx, NY'
}, {
'fname': 'Jon',
'lname': 'Lester',
'location': 'Boston, MA'
}];
});
myApp.filter("headerChunk", function () {
return function (orig, same, getChunkID) {
if (!(orig instanceof Array)) return orig;
if (orig.length == 0) return orig;
var result = [];
var cur = [];
var i = 0
for (i = 0; i < orig.length; i++) {
if (i == 0 || same(orig[i], orig[i - 1])) {
cur.push(orig[i]);
} else {
result.push({
id: getChunkID(orig[i - 1]),
items: cur
});
cur = [orig[i]];
}
}
result.push({
id: getChunkID(orig[orig.length - 1]),
items: cur
});
for (i = 0; i < result.length; i++) {
result[i].$$hashKey = i;
}
return result;
}
});
$scope.filteredData = $filter("headerChunk")(
$scope.filteredData,
// The first argument is a function 'same' that is responsible for determining
// whether two objects of the collection belong in the same category. We desire
// two persons to go in the same category is their names start with the same first
// letter:
function (p1, p2) {
return (p1.name.charAt(0) == p2.name.charAt(0));
},
// The second function 'getChunkID' is responsible for "naming" the resulting chunk.
// We wish for the chunks to be identified by the letter that their constituents'
// names start with:
function (p) {
return p.name.charAt(0);
}
);
directory.html:
<div ng-repeat="group in contacts | orderBy:name | headerChunk:sameFunc:idFunc">
<ul>
<li ng-repeat="item in group.items">
{{item.lname}}, {{item.fname}}<br>
{{item.location}}
<hr>
</li>
</ul>
不知道該怎么辦了。
您閱讀評論了嗎? 第一個人是用underscore.js完成的,所以是用underscore.js或lodash.js完成的。
// include the script
<script src="//cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script>
<div ng-repeat="(k,v) in sortedcontacts">
<span>{{k}}</span>
<ul>
<li ng-repeat="item in v">
{{item.lname}}, {{item.fname}}<br>
{{item.location}}
<hr>
</li>
</ul>
</div>
'use strict';
var myApp = angular.module('myappname');
myApp.controller('DirectoryCtrl', function ($scope) {
$scope.contacts = [
{'fname': 'Randy',
'lname':'Johnson',
'location': 'Seattle, WA'},
{'fname': 'Andy',
'lname':'Pettite',
'location': 'Bronx, NY'},
{'fname': 'Jon',
'lname':'Lester',
'location': 'Boston, MA'}
];
$scope.sortedcontacts = _.groupBy($scope.contacts, function(item) {return item.fname[0]; });
});
// you don't need those filter codes
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