我在 JavaScript 中有以下数组:
myArray = ["lu9","lu10","lu11","ma9","ma10","ma11","mi9","mi10","mi11"];
然后,我需要显示值(例如在警报中)但必须按如下方式排列:
"lu9,ma9,mi9,lu10,ma10,mi10,lu11,ma11,mi11"
我怎么能做到这一点?
我在 JavaScript 中有以下数组:
myArray = ["lu9","lu10","lu11","ma9","ma10","ma11","mi9","mi10","mi11"];
然后,我需要显示值(例如在警报中)但必须按如下方式排列:
"lu9,ma9,mi9,lu10,ma10,mi10,lu11,ma11,mi11"
我怎么能做到这一点?
列表中的每个项目都包含两部分:前导字符混杂(mi、ma、lu)和数字后缀。为了正确排序,我们必须将两者都考虑在内。
array.sort(function sorter (a, b) {
var re = /^(\D+)(\d+)$/,
left = re.exec(a),
right = re.exec(b);
if (left[1] === right[1]) {
return Number(left[2]) - Number(right[2]);
}
return left[1] < right[1] ? -1 : 1;
});
假设a = lu9
和b = lu10
:
1. left = ['lu9', 'lu', '9']
2. right = ['lu10', 'lu', '10']
3. left[1] === right[1]
1. Number(left[2]) = 9
2. Number(right[2]) = 10
3. return 9 - 10 (negative number, a before b)
现在如果我们的输入是a = lu9
and b = mi4
:
1. left = ['lu9', 'lu', '9']
2. right = ['mi4', 'mi', '4']
3. left[1] !== right[1]
1. left[1] < right[1] = true
2. return -1
我们需要先按数字排序,然后按字母排序。这里不需要正则表达式。
我们将使用填充:
so ma11 will be 0011ma
and mi11 will be 0011mi
and ma11 will be 0011ma
(and mi9 will be 0009mi , the padding helps 11 to be bigger then 2 as string)
所以现在对其进行排序 - 将产生正确的结果。
var a = ["ma9", "ma10", "ma11", "mi9", "mi10", "mi11", "lu9", "lu10", "lu11"]
a.sort(function (a, b)
{
return calc(a) > calc(b);
});
function calc(x)
{
return ("0000" + x.slice(2)).slice(-4) + x.slice(0,2);
}
结果 :
["ma9", "ma10", "ma11", "mi9", "mi10", "mi11", "lu9", "lu10", "lu11"]
var myArray = ["lu9","lu10","lu11","ma9","ma10","ma11","mi9","mi10","mi11"];
var derp = function(a, b) {
a = a.replace(/[^0-9]+/g, '', a);
b = b.replace(/[^0-9]+/g, '', b);
return a < b;
}
myArray.sort(derp);
var myArray = ["lu9", "lu10", "lu11", "ma9", "ma10", "ma11", "mi9", "mi10", "mi11"];
function myResult(myArray) {
myArray = myArray.slice().sort(function (a, b) {
var reg = /\d+/ //A regex to extract the numerical part
var num = 2 * (+a.match(reg) - +b.match(reg)) //Put a weight of 2 on the numerical value
var str = a > b ? 1 : a < b ? -1 : 0 //The strings value with a single weight
return num + str //add them and we have a positive or negative value with a correct weight on the numerical part
})
return "" + myArray
}
console.log (myResult(myArray)) //"lu9,ma9,mi9,lu10,ma10,mi10,lu11,ma11,mi11"
这是一个小提琴