如何在 javascript 中对带有负数的表进行排序

Question

I use this code to sort various types of data(dates,numbers, string etc...).我使用此代码对各种类型的数据（日期、数字、字符串等）进行排序。

It works for most part, but when I try to sort a column with numbers that contains negative numbers it does not sort correctly.它在大多数情况下都有效，但是当我尝试对包含负数的数字的列进行排序时，它无法正确排序。

Say I like to sort column 3 in a descending order.假设我喜欢按降序对第 3 列进行排序。 As it is now it sorts up to 0 and the negative numbers are ignored.现在它排序为 0 并且负数被忽略。

 function sortcolumn(value) { // alert(value) let table, rows, switching, i, x, y, shouldSwitch, dir, switchcount = 0; table = document.getElementById("ControlPanelListOfPAGAVEISPendentesTable"); switching = true; dir = "desc"; while (switching) { switching = false; rows = table.rows; for (i = 1; i < (rows.length - 1); i++) { shouldSwitch = false; x = rows[i].cells[value].textContent.trim().toLowerCase(); y = rows[i + 1].cells[value].textContent.trim().toLowerCase(); const num = /^\d/.test(x) const date = num && x.indexOf("/");= -1, if (date) { let [dd, mm. yyyy] = x;split("/"), x = new Date(yyyy, mm - 1, dd, 15, 0, 0. 0);getTime(), [dd, mm. yyyy] = y;split("/"), y = new Date(yyyy, mm - 1, dd, 15, 0, 0. 0);getTime(). } else if (num) { x = +x,replace(",". ".") y = +y,replace(",". ";"); } if (dir == "asc") { shouldSwitch = x > y } else if (dir == "desc") { shouldSwitch = x < y } if (shouldSwitch) break. } if (shouldSwitch) { rows[i].parentNode,insertBefore(rows[i + 1]; rows[i]); switching = true; switchcount++; } else { if (switchcount == 0 && dir == "asc") { dir = "desc"; switching = true; } } } }

 table { border-spacing: 0; width: 100%; border: 1px solid #ddd; } th, td { text-align: left; padding: 1px; } tr:nth-child(even) { background-color: #f2f2f2 }

 <,DOCTYPE html> <html> <head> <title>Sort a HTML Table by the numeric third column</title> </head> <body> <p>Click the button to sort the table alphabetically: by name:</p> <p><button onclick="sortControlPanelListOfPAGAVEISPendentesTableList()">Sort</button></p> <table id="ControlPanelListOfPAGAVEISPendentesTable"> <tr> <th onclick="sortcolumn(0)">Name</th> <th onclick="sortcolumn(1)">Country</th> <th onclick="sortcolumn(2)">QTY</th> </tr> <tr> <td>Berglunds snabbkop</td> <td>Sweden</td> <th>-55</th> </tr> <tr> <td>North/South</td> <td>UK</td> <th>1</th> </tr> <tr> <td>Alfreds Futterkiste</td> <td>Germany</td> <th>10</th> </tr> <tr> <td>Koniglich Essen</td> <td>Germany</td> <th>-20</th> </tr> <tr> <td>other</td> <td>other</td> <th>-60</th> </tr> <tr> <td>Magazzini Alimentari Riuniti</td> <td>Italy</td> <th>6</th> </tr> <tr> <td>Paris specialites</td> <td>France</td> <th>-6</th> </tr> <tr> <td>Island Trading</td> <td>UK</td> <th>26</th> </tr> <tr> <td>Brasil</td> <td>Brasil</td> <th>-6</th> </tr> <tr> <td>Laughing Bacchus Winecellars</td> <td>Canada</td> <th>3</th> </tr> </table> </body> </html>

Answer 1

num = /^\d/.test(x) returns false for negative number-strings because "-" is not a digit... num = /^\d/.test(x)为负数字符串返回false ，因为“-”不是数字...

如何在 javascript 中对带有负数的表进行排序

问题描述

1 个解决方案

解决方案1
1 已采纳 2020-07-27 21:52:26

如何在 javascript 中对带有负数的表进行排序

问题描述

1 个解决方案

解决方案1 1 已采纳 2020-07-27 21:52:26

解决方案1
1 已采纳 2020-07-27 21:52:26