此问题与此问题相关，并基于此问题的脚本:How does one sort a multi dimensional array by multiple columns in JavaScript? 。我的解决方案当时有效(或者我相信是这样)，但在对我们的自定义标记进行了一系列更改以使其跨浏览器兼容之后，我现在遇到了一个新问题。
所以我有以下代码。对于篇幅，我深表歉意；这是我在复制问题的同时可以简化它的最大程度:
<table border=1>
<tr style="font-weight:bold;">
<td>Begin Text</td>
<td>Begin Number</td>
<td>Sorted Text</td>
<td>Sorted Number</td>
</tr>
<tr>
<td id="r1c1"></td>
<td id="r1c2"></td>
<td id="r1c3"></td>
<td id="r1c4"></td>
</tr>
<tr>
<td id="r2c1"></td>
<td id="r2c2"></td>
<td id="r2c3"></td>
<td id="r2c4"></td>
</tr>
<tr>
<td id="r3c1"></td>
<td id="r3c2"></td>
<td id="r3c3"></td>
<td id="r3c4"></td>
</tr>
<tr>
<td id="r4c1"></td>
<td id="r4c2"></td>
<td id="r4c3"></td>
<td id="r4c4"></td>
</tr>
<tr>
<td id="r5c1"></td>
<td id="r5c2"></td>
<td id="r5c3"></td>
<td id="r5c4"></td>
</tr>
<tr>
<td id="r6c1"></td>
<td id="r6c2"></td>
<td id="r6c3"></td>
<td id="r6c4"></td>
</tr>
<tr>
<td id="r7c1"></td>
<td id="r7c2"></td>
<td id="r7c3"></td>
<td id="r7c4"></td>
</tr>
<tr>
<td id="r8c1"></td>
<td id="r8c2"></td>
<td id="r8c3"></td>
<td id="r8c4"></td>
</tr>
<tr>
<td><input type="button" onclick="testSort(1);" value="Sort"></td>
<td><input type="button" onclick="testSort(2);" value="Sort"></td>
</tr>
</table>
<script>
function testSort(orderCol) {
orderList = [orderCol];
dataArr = do2DArraySort(dataArr, orderList, 'desc');
for (x=1; x<=numRows; x++) {
document.getElementById('r' + x + 'c3').innerHTML = dataArr[x-1][1];
document.getElementById('r' + x + 'c4').innerHTML = dataArr[x-1][2];
}
}
function TwoDimensionalArray(iRows, iCols) {
var i;
var j;
var a = new Array(iRows);
for (i=0; i < iRows; i++) {
a[i] = new Array(iCols);
for (j=0; j < iCols; j++) {
a[i][j] = "";
}
}
return(a);
}
function do2DArraySort(dataArr, orderList, orderDir) {
//Loop over each item in the list of sort columns. For each one invoke the sort method on the array using the appropriate function.
for (x=orderList.length-1; x >= 0; x--) {
if (orderDir[x] == 'asc') {
dataArr.sort(sortMethodFunctionAsc);
} else {
dataArr.sort(sortMethodFunctionDesc);
}
}
return dataArr;
}
function checkSortValues(a, b) {
var dataType = 'Text';
if ((IsNumeric(a) && IsNumeric(b)) || (a == null && IsNumeric(b)) || (IsNumeric(a) && b == null)) {
dataType = 'Numeric';
}
if ((IsDate(a) && IsDate(b)) || (a == null && IsDate(b)) || (IsDate(a) && b == null)) {
dataType = 'Date';
}
return dataType;
}
function sortMethodFunctionAsc(a, b) {
if (checkSortValues(a[orderList[x]], b[orderList[x]]) == 'Numeric') {
//If the values are numeric, simply check which is larger than the other.
return a[orderList[x]] - b[orderList[x]];
} else if (checkSortValues(a[orderList[x]], b[orderList[x]]) == 'Date') {
//If the values are dates they need converted to date objects. 95% of the time this is not necessary as they are already passed in as dates,
//but the conversion is required to catch the few cases when they are not.
var a2 = new Date(a[orderList[x]]);
var b2 = new Date(b[orderList[x]]);
//The getTime method is used to convert the dates into millisecond ticker equivalents for easier comparison.
return a2.getTime() - b2.getTime();
} else {
//If one of the values is a string, convert both to a string and compare alphabetically.
if (a[orderList[x]].toString() > b[orderList[x]].toString()) {
return 1;
} else if (a[orderList[x]].toString() < b[orderList[x]].toString()) {
return -1;
} else {
//If they are the same, tell the sort to skip them.
return 0;
}
}
}
function sortMethodFunctionDesc(a, b) {
//This function is identical to the ascending one, but the comparison operators are reversed.
if (checkSortValues(a[orderList[x]], b[orderList[x]]) == 'Numeric') {
return b[orderList[x]] - a[orderList[x]];
} else if (checkSortValues(a[orderList[x]], b[orderList[x]]) == 'Date') {
var a2 = new Date(a[orderList[x]]);
var b2 = new Date(b[orderList[x]]);
return b2.getTime() - a2.getTime();
} else {
if (a[orderList[x]].toString() < b[orderList[x]].toString()) {
return 1;
} else if (a[orderList[x]].toString() > b[orderList[x]].toString()) {
return -1;
} else {
return 0;
}
}
}
function IsNumeric(input) {
return (input - 0) == input && input.length > 0;
}
function IsDate(testValue) {
var returnValue = false;
var testDate;
try {
testDate = new Date(testValue);
if (!isNaN(testDate)) {
returnValue = true;
} else {
returnValue = false;
}
}
catch (e) {
returnValue = false;
}
return returnValue;
}
numRows = 8;
orderList = [1];
dataArr = TwoDimensionalArray(numRows, 2);
dataArr[0][1] = 'Jimbo';
dataArr[0][2] = 3;
dataArr[1][1] = 'Jim';
dataArr[1][2] = 0.65;
dataArr[2][1] = 'Jackie';
dataArr[2][2] = 1.25;
dataArr[3][1] = 'John';
dataArr[3][2] = 0.8;
dataArr[4][1] = 'Jacob';
dataArr[4][2] = 0.95;
dataArr[5][1] = 'Jill';
dataArr[5][2] = 0.85;
dataArr[6][1] = 'Jan';
dataArr[6][2] = 0.8;
dataArr[7][1] = 'Jamie';
dataArr[7][2] = 1.45;
for (x=1; x<=numRows; x++) {
document.getElementById('r' + x + 'c1').innerHTML = dataArr[x-1][1];
document.getElementById('r' + x + 'c2').innerHTML = dataArr[x-1][2];
}
</script>
如果您在浏览器中打开它，您将看到一个 html 表格，该表格按照输入的顺序(即:随机)吐出每个数组列。如果单击列底部的任一按钮，它将对数据进行排序并将其放置在第三列和第四列中。我的真实应用程序会删除并重新加载表格，但这仅用于演示目的。
单击文本列底部的排序按钮效果很好；它按名称字母顺序对数组进行排序。但是，如果您对数字列进行排序，您将看到顺序发生变化，但绝不是正确的。每次结果都是相同的，但如果您立即单击数字排序或在文本搜索后单击数字排序，结果会有所不同(因为搜索基于数组的当前状态而不是原始数组)。这正是我在应用程序中看到的内容。
我花了一段时间才缩小范围，但我已经确定:
1) 文本、日期和整数排序良好；只有小数没有。
2)小数按第一位排序，忽略小数点后的数据。
3)多列排序工作正常，但显示出相同的异常，因此我在本示例中将其简化为单列排序。
我已经盯着这个看了好几个小时了，但运气不好，需要用一双新的眼睛。为什么我的 array.sort 函数无法正常工作？任何想法将不胜感激。
最佳答案
您的 checkSortValues 函数存在问题，一旦数据类型设置为数字，它也会对日期进行积极测试。
此外，您的 IsNumeric 测试中存在错误，其中 input.length 将返回未定义。您应该注释掉/更改测试的第二部分。
function IsNumeric(input) {
return (input - 0) == input // && input.length > 0;
}
如果您更改 IsNumeric 测试，并且使用 else if 而不是 if 进行日期测试，我认为它可以解决您的问题.
function checkSortValues(a, b) {
var dataType = 'Text';
if ((IsNumeric(a) && IsNumeric(b)) || (a == null && IsNumeric(b)) || (IsNumeric(a) && b == null)) {
dataType = 'Numeric';
}
else if ((IsDate(a) && IsDate(b)) || (a == null && IsDate(b)) || (IsDate(a) && b == null)) {
dataType = 'Date';
}
return dataType;
}
编辑:包括完整的代码以及我建议的修改...
我已经测试过这个，它对我有用，按正确的顺序排序。
<table border=1>
<tr style="font-weight:bold;">
<td>Begin Text</td>
<td>Begin Number</td>
<td>Sorted Text</td>
<td>Sorted Number</td>
</tr>
<tr>
<td id="r1c1"></td>
<td id="r1c2"></td>
<td id="r1c3"></td>
<td id="r1c4"></td>
</tr>
<tr>
<td id="r2c1"></td>
<td id="r2c2"></td>
<td id="r2c3"></td>
<td id="r2c4"></td>
</tr>
<tr>
<td id="r3c1"></td>
<td id="r3c2"></td>
<td id="r3c3"></td>
<td id="r3c4"></td>
</tr>
<tr>
<td id="r4c1"></td>
<td id="r4c2"></td>
<td id="r4c3"></td>
<td id="r4c4"></td>
</tr>
<tr>
<td id="r5c1"></td>
<td id="r5c2"></td>
<td id="r5c3"></td>
<td id="r5c4"></td>
</tr>
<tr>
<td id="r6c1"></td>
<td id="r6c2"></td>
<td id="r6c3"></td>
<td id="r6c4"></td>
</tr>
<tr>
<td id="r7c1"></td>
<td id="r7c2"></td>
<td id="r7c3"></td>
<td id="r7c4"></td>
</tr>
<tr>
<td id="r8c1"></td>
<td id="r8c2"></td>
<td id="r8c3"></td>
<td id="r8c4"></td>
</tr>
<tr>
<td><input type="button" onclick="testSort(1);" value="Sort"></td>
<td><input type="button" onclick="testSort(2);" value="Sort"></td>
</tr>
</table>
<script>
function testSort(orderCol) {
orderList = [orderCol];
dataArr = do2DArraySort(dataArr, orderList, 'desc');
for (x=1; x<=numRows; x++) {
document.getElementById('r' + x + 'c3').innerHTML = dataArr[x-1][1];
document.getElementById('r' + x + 'c4').innerHTML = dataArr[x-1][2];
}
}
function TwoDimensionalArray(iRows, iCols) {
var i;
var j;
var a = new Array(iRows);
for (i=0; i < iRows; i++) {
a[i] = new Array(iCols);
for (j=0; j < iCols; j++) {
a[i][j] = "";
}
}
return(a);
}
function do2DArraySort(dataArr, orderList, orderDir) {
//Loop over each item in the list of sort columns. For each one invoke the sort method on the array using the appropriate function.
for (x=orderList.length-1; x >= 0; x--) {
if (orderDir[x] == 'asc') {
dataArr.sort(sortMethodFunctionAsc);
} else {
dataArr.sort(sortMethodFunctionDesc);
}
}
return dataArr;
}
function checkSortValues(a, b) {
var dataType = 'Text';
if ((IsNumeric(a) && IsNumeric(b)) || (a == null && IsNumeric(b)) || (IsNumeric(a) && b == null)) {
dataType = 'Numeric';
}
else if ((IsDate(a) && IsDate(b)) || (a == null && IsDate(b)) || (IsDate(a) && b == null)) {
dataType = 'Date';
}
return dataType;
}
function sortMethodFunctionAsc(a, b) {
if (checkSortValues(a[orderList[x]], b[orderList[x]]) == 'Numeric') {
//If the values are numeric, simply check which is larger than the other.
return a[orderList[x]] - b[orderList[x]];
} else if (checkSortValues(a[orderList[x]], b[orderList[x]]) == 'Date') {
//If the values are dates they need converted to date objects. 95% of the time this is not necessary as they are already passed in as dates,
//but the conversion is required to catch the few cases when they are not.
var a2 = new Date(a[orderList[x]]);
var b2 = new Date(b[orderList[x]]);
//The getTime method is used to convert the dates into millisecond ticker equivalents for easier comparison.
return a2.getTime() - b2.getTime();
} else {
//If one of the values is a string, convert both to a string and compare alphabetically.
if (a[orderList[x]].toString() > b[orderList[x]].toString()) {
return 1;
} else if (a[orderList[x]].toString() < b[orderList[x]].toString()) {
return -1;
} else {
//If they are the same, tell the sort to skip them.
return 0;
}
}
}
function sortMethodFunctionDesc(a, b) {
//This function is identical to the ascending one, but the comparison operators are reversed.
if (checkSortValues(a[orderList[x]], b[orderList[x]]) == 'Numeric') {
return b[orderList[x]] - a[orderList[x]];
} else if (checkSortValues(a[orderList[x]], b[orderList[x]]) == 'Date') {
var a2 = new Date(a[orderList[x]]);
var b2 = new Date(b[orderList[x]]);
return b2.getTime() - a2.getTime();
} else {
if (a[orderList[x]].toString() < b[orderList[x]].toString()) {
return 1;
} else if (a[orderList[x]].toString() > b[orderList[x]].toString()) {
return -1;
} else {
return 0;
}
}
}
function IsNumeric(input) {
return (input - 0) == input// && input.length > 0;
}
function IsDate(testValue) {
var returnValue = false;
var testDate;
try {
testDate = new Date(testValue);
if (!isNaN(testDate)) {
returnValue = true;
} else {
returnValue = false;
}
}
catch (e) {
returnValue = false;
}
return returnValue;
}
numRows = 8;
orderList = [1];
dataArr = TwoDimensionalArray(numRows, 2);
dataArr[0][1] = 'Jimbo';
dataArr[0][2] = 3;
dataArr[1][1] = 'Jim';
dataArr[1][2] = 0.65;
dataArr[2][1] = 'Jackie';
dataArr[2][2] = 1.25;
dataArr[3][1] = 'John';
dataArr[3][2] = 0.8;
dataArr[4][1] = 'Jacob';
dataArr[4][2] = 0.95;
dataArr[5][1] = 'Jill';
dataArr[5][2] = 0.85;
dataArr[6][1] = 'Jan';
dataArr[6][2] = 0.8;
dataArr[7][1] = 'Jamie';
dataArr[7][2] = 1.45;
for (x=1; x<=numRows; x++) {
document.getElementById('r' + x + 'c1').innerHTML = dataArr[x-1][1];
document.getElementById('r' + x + 'c2').innerHTML = dataArr[x-1][2];
}
</script>
您可以确认here如果你想...
关于javascript - 对多维数组进行排序不适用于小数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/8436446/