排序numAlpha字符串列表

Question

我想排序包含數字& alpha序列的字符串列表。我想先按數字排序，然後按alpha，如1a，2b，4，77c，743等排序。

我一直在玩着下面的javascript，我已經接近將我的頭撞過壁。任何人都可以給我一些指點嗎？

var a1 = ["4a", "4c", "1a", "4b", "13c", "4a", "1a", "11c", "112c", "12", "9"]; 

var a2 = a1.sort(function(a, b) { 

    if (a.slice(-1) == "a" || a.slice(-1) == "b" || a.slice(-1) == "c") { 
    var charPart = [a.slice(-1), b], 
     numPart = [a.slice(0, a.length - 1), b]; 
    if (b.slice(-1) == "a" || b.slice(-1) == "b" || b.slice(-1) == "a") { 
     var charPart = [a.slice(-1), b.slice(-1)], 
     numPart = [a.slice(0, a.length - 1), b.slice(0, b.length - 1)]; 
    } 
    } 


    if (numPart[0] < numPart[1]) return -1; 
    else if (numPart[0] > numPart[1]) return 1; 
    else if (numPart[0] == numPart[1]) return -1; 
    else { 
    if (charPart[0] < charPart[1]) return -1; 
    else if (charPart[0] > charPart[1]) return 1 
    } 
}); 

http://jsfiddle.net/8fRsD/307/

Answer 1

你可以使用正則表達式與前瞻非數值分裂字符串。

例如'13c'在拆分後變成['13', 'c']。

在回調中，值或缺省值（如空字符串）用於比較。

var a1 = ["4a", "4c", "1a", "4b", "13c", "4a", "1a", "11c", "112c", "12", "9"]; 
 
\t \t 
 
a1.sort(function (a, b) { 
 
    var aa = a.split(/(?=\D)/), 
 
     bb = b.split(/(?=\D)/); 
 
    return aa[0] - bb[0] || (aa[1] || '').localeCompare(bb[1] || ''); 
 
}); 
 
console.log(a1);

Answer 2

如果目標是通過在每個串（第一）數字部分的第一排序，然後內具有相同的數值，由（第一）的α部分的條目字符串，這樣做是  —看評論：

var a1 = ["4a", "4c", "1a", "4b", "13c", "4a", "1a", "11c", "112c", "12", "9"]; 
 
a1.sort(function(l, r) { 
 
    var lnum = l.match(/\d+/); 
 
    var rnum = r.match(/\d+/); 
 
    if (lnum && rnum) { 
 
    // We have numbers, compare them 
 
    lnum = +lnum[0]; 
 
    rnum = +rnum[0]; 
 
    if (lnum != rnum) { 
 
     // Not the same, put the smaller one first 
 
     return lnum - rnum; 
 
    } 
 
    } 
 
    
 
    // Either no numbers, or they match; use alpha 
 
    var lalpha = l.match(/\D+/); 
 
    var ralpha = r.match(/\D+/); 
 
    if (lalpha && ralpha) { 
 
    // We have alpha, return result of comparing them 
 
    return lalpha[0].localeCompare(ralpha[0]); 
 
    } 
 
    
 
    // Neither numbers or alpha; give up 
 
    return 0; 
 
}); 
 
console.log(a1);