我在下面发布了javascript对象数组，我需要有选择地随机选择。也就是说，我需要将数组分成块，使用shuffle函数随机化每个块，然后连接所有chuck以重建数组。有没有办法在函数中执行此操作？
块由以下字段组合定义：
和5种可能的组合是：
这里是我现在拥有的数组和代码。这显然不能完成这项工作，因为它无需选择性地随机化整个数组。
function shuffle(array) {
var currentIndex = array.length, temporaryValue, randomIndex ;
// While there remain elements to shuffle...
while (0 !== currentIndex) {
// Pick a remaining element...
randomIndex = Math.floor(Math.random() * currentIndex);
currentIndex -= 1;
// And swap it with the current element.
temporaryValue = array[currentIndex];
array[currentIndex] = array[randomIndex];
array[randomIndex] = temporaryValue;
}
return array;
}
var myArray = [
{
"trial" : {
"index": 0,
"word": "WORD 1",
"keyboard": true,
"train": true,
"test": null,
"grammatical": true,
"grammar" : "A",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
},
{
"trial" : {
"index": 1,
"word": "WORD 2",
"keyboard": true,
"train": true,
"test": false,
"grammatical": true,
"grammar" : "A",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
},
{
"trial" : {
"index": 1,
"word": "WORD 3",
"keyboard": true,
"train": false,
"test": true,
"grammatical": true,
"grammar" : "A",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
},
"trial" : {
"index": 0,
"word": "WORD 1",
"keyboard": true,
"train": true,
"test": null,
"grammatical": true,
"grammar" : "B",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
},
{
"trial" : {
"index": 1,
"word": "WORD 2",
"keyboard": true,
"train": true,
"test": false,
"grammatical": true,
"grammar" : "B",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
},
{
"trial" : {
"index": 1,
"word": "WORD 3",
"keyboard": true,
"train": false,
"test": true,
"grammatical": true,
"grammar" : "B",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
},
{
"trial" : {
"index": 1,
"word": "WORD 3",
"keyboard": true,
"train": false,
"test": true,
"grammatical": true,
"grammar" : "B",
"testSeq" : 2
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
}
];
console.log(shuffle(myArray));
非常感谢。
答案 0 :(得分：1)
这将创建5个不同的数组，但是可以完成这项工作，代码：
function shuffle(array) {
var temp = {
arr1: [],
arr2: [],
arr3: [],
arr4: [],
arr5: []
};
for (var i=0; i<array.length; i++) {
var cur = array[i].trial;
if(cur.train && cur.grammar == "A" && cur.testSeq == 1) temp.arr1.push(array[i]);
else if(!cur.train && cur.grammar == "A" && cur.testSeq == 1) temp.arr2.push(array[i]);
else if(cur.train && cur.grammar == "B" && cur.testSeq == 1) temp.arr3.push(array[i]);
else if(!cur.train && cur.grammar == "B" && cur.testSeq == 1) temp.arr4.push(array[i]);
else if(cur.train && cur.grammar == "A" && cur.testSeq == 2) temp.arr5.push(array[i]);
}
for(var j=0; j<temp.length; j++)
{
var curArr = temp[i];
var currentIndex = curArr.length, temporaryValue, randomIndex ;
// While there remain elements to shuffle...
while (0 !== currentIndex) {
// Pick a remaining element...
randomIndex = Math.floor(Math.random() * currentIndex);
currentIndex -= 1;
// And swap it with the current element.
temporaryValue = curArr[currentIndex];
curArr[currentIndex] = curArr[randomIndex];
curArr[randomIndex] = temporaryValue;
}
}
return temp.arr1.concat(temp.arr2, temp.arr3, temp.arr4, temp.arr5);
}
var myArray = [
{
"trial" : {
"index": 0,
"word": "WORD 1",
"keyboard": true,
"train": true,
"test": null,
"grammatical": true,
"grammar" : "A",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
},
{
"trial" : {
"index": 1,
"word": "WORD 2",
"keyboard": true,
"train": true,
"test": false,
"grammatical": true,
"grammar" : "A",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
},
{
"trial" : {
"index": 1,
"word": "WORD 3",
"keyboard": true,
"train": false,
"test": true,
"grammatical": true,
"grammar" : "A",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
},
"trial" : {
"index": 0,
"word": "WORD 1",
"keyboard": true,
"train": true,
"test": null,
"grammatical": true,
"grammar" : "B",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
},
{
"trial" : {
"index": 1,
"word": "WORD 2",
"keyboard": true,
"train": true,
"test": false,
"grammatical": true,
"grammar" : "B",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
},
{
"trial" : {
"index": 1,
"word": "WORD 3",
"keyboard": true,
"train": false,
"test": true,
"grammatical": true,
"grammar" : "B",
"testSeq" : 1
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
},
{
"trial" : {
"index": 1,
"word": "WORD 3",
"keyboard": true,
"train": false,
"test": true,
"grammatical": true,
"grammar" : "B",
"testSeq" : 2
},
"metadata" : {
"instructions" : "Type in the word shown as quickly as possible",
"submitUrl" : "/server/trialSubmit"
}
}
];
console.debug(shuffle(myArray));