angularjs – ng-repeat angular中的shuffle数组
发布时间:2020-12-17 18:02:12 所属栏目:安全 来源:网络整理
导读:我正在创建一个测验,每次我开始测验时我想要改变问题,这样他们每次都不会出现在同一个顺序中. 我在我的HTML代码中有这个: div ng-repeat="question in questions | filter:ids | orderBy:randomSort" div id="question"{{question.question}}/divimg id="ne
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我正在创建一个测验,每次我开始测验时我想要改变问题,这样他们每次都不会出现在同一个顺序中.
我在我的HTML代码中有这个: <div ng-repeat="question in questions | filter:ids | orderBy:randomSort">
<div id="question">{{question.question}}</div><img id="nextImg" ng-src="../app/img/next.png" ng-click="next()" />
<img class="quizImg" ng-hide="{{question.image}}==null" ng-src="{{question.image}}" />
<div class="answer" ng-repeat="answer in question.answers">
<input type="radio" ng-click="checked(answer)">{{answer.answer}}
</div>
<!--input id="nextQuestion" type="button" ng-click="next()" value="{{buttonText}}"-->
</div>
这在我的控制器中 lycheeControllers.controller('quizCtrl',['$scope','$http',function ($scope,$http) {
$http.get('json/questions.json').success(function (data) {
//all questions
$scope.questions = data;
$scope.titel = "Check your knowledge about lychees"
$scope.randomSort = function(question) {
return Math.random();
};
//filter for getting answers / question
$scope.ids = function (question) {
return question.id == number;
}
$scope.find = function (id) {
if (id == number) {
return true;
}
}
$scope.next = function () {
if (!(number == (data.length))) {
//questionId++;
number++;
if (correct == true) {
points++;
}
//alert(points);
} else {
if (!end) {
if (correct == true) {
points++;
end = true;
}
}
alert("Quiz finished: your total score is: " + points);
}
correct = false;
}
$scope.checked = function (answer) {
//alert(answer.answer);
if (answer.correct == "yes") {
correct = true;
} else {
correct = false;
}
//alert(correct);
}
});
}])
;
不幸的是,这根本不起作用.希望有人可以帮助我这个吗? 解决方法
Thx到
http://bost.ocks.org/mike/shuffle/
使用这个改组功能: 与它相关的是,输入数组保持可绑定,因为混洗不会创建新数组,而是在同一引用上进行混洗. // -> Fisher–Yates shuffle algorithm
var shuffleArray = function(array) {
var m = array.length,t,i;
// While there remain elements to shuffle
while (m) {
// Pick a remaining element…
i = Math.floor(Math.random() * m--);
// And swap it with the current element.
t = array[m];
array[m] = array[i];
array[i] = t;
}
return array;
}
旁注:lodash的_.shuffle(数组)也不起作用,因为它们正在创建一个破坏绑定的新数组(因此一个混洗数组不会触发模型变脏) 要完成工作解决方案的答案,请执行以下步骤: >复制该功能,以便您可以在控制器内使用它. ???? $http.get('json/questions.json').success(function (data) {
//all questions
$scope.questions = data;
shuffleArray($scope.questions);
...
}
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