javascript：Array.sort（）在大型阵列上是否失败？

Question

Array.sort（）在大型阵列上是否失败？还是我错过了什么？我还检查了是否没有错误地对字符串进行排序。我似乎无法理解为什么失败

直接从Chrome调试器的手表上粘贴：

这是您可以玩的东西：

arr = [1.238648000000012,1.5776880000000233,1.6462280000000078,10.007896000000017,10.014455999999996,10.016970000000015,10.018888000000004,10.028069000000016,10.047926000000018,10.056818000000021,10.057980999999984,10.075353000000007,10.086242000000027,10.088684999999998,10.097217,10.102441999999996,10.104630999999983,10.107723000000021,10.108536000000015,10.115552999999977,10.137179000000003,10.171389999999974,10.203172999999992,10.208004000000017,10.217614000000026,10.231874000000005,10.241456000000028,10.243750999999975,10.252985000000024,10.255207999999982,10.27183500000001,10.30159500000002,10.342756000000008,10.35523599999999,10.364777000000004,10.391841,10.40662900000001,10.422856000000024,10.428019000000006,10.438702999999975,10.493548999999973,10.495686999999975,10.522063000000003,10.541649000000007,10.577163999999982,10.605306999999982,10.614864000000011,10.63799899999998,10.677408000000014,10.677971000000014,10.678615999999977,10.683666000000017,10.697460999999976,10.702691000000016,10.738349000000028,10.748320999999976,10.783839,10.834334000000013,10.843086000000028,10.862792000000013,10.893118000000015,10.905455000000018,10.906916000000024,10.923288000000014,10.958798999999999,10.999311999999975,11.003940999999998,11.01112999999998,11.011986999999976,11.022662000000025,11.030069000000026,11.033493000000021,11.06088699999998,11.089207999999985,11.120248000000004,11.169981000000007,11.22742599999998,11.373028999999974,11.38974300000001,11.406037000000026,11.422123,11.445996999999977,11.445996999999977,11.452351000000021,11.45395400000001,11.455066999999985,11.530115000000023,11.563641000000018,11.649070999999992,11.681149000000005,11.699284999999975,11.715215,11.786181,11.798755000000028,11.912154999999984,11.914702999999975,11.92000999999999,11.925179000000014,11.989391000000012,12.065800000000024,12.077261000000021,12.144492000000014,12.213693999999975,12.22724199999999,12.244993000000022,12.293795999999986,12.337166000000025,12.366329000000007,12.42165799999998,12.511757999999986,12.57682699999998,12.583461,12.612408000000016,12.616739999999993,12.662854999999979,12.663344999999993,12.663866999999982,12.673579000000018,12.727368000000013,12.738046999999995,12.748396000000014,12.768007000000011,12.853508999999974,12.860353999999973,12.884284999999977,12.900110999999981,12.92121800000001,12.976439000000028,12.98437100000001,13.01056299999999,13.012036000000023,13.055876000000012,13.138213000000007,13.13959699999998,13.147134999999992,13.156939000000023,13.171355000000005,13.223600999999974,13.240787000000012,13.26833499999998,13.271131999999994,13.272153000000003,13.291954999999973,13.307935999999984,13.41423500000002,13.417280000000005,13.43734999999998,13.448892,13.489640000000009,13.490972,13.491602999999998,13.502335000000016,13.532481000000018,13.55182000000002,13.555890999999974,13.578921999999977,13.580539999999985,13.652214000000015,13.662713999999994,13.674057000000005,13.722780999999998,13.781020000000012,13.790301,13.801070999999979,13.801070999999979,13.826026000000013,13.843449000000021,13.974924999999985,14.012158,14.02240599999999,14.041520999999989,14.088280999999995,14.189909,14.226448000000005,14.288890999999978,14.298192000000029,14.36671100000001,14.379841999999996,14.459216000000026,14.471633999999995,14.51484099999999,14.527475999999979,14.538589000000002,14.608111000000008,14.72200700000002,14.750081000000023,14.818646999999999,14.847937000000002,14.85942,14.874291000000028,14.987093000000016,15.072758000000022,15.126066999999978,15.220902000000024,15.24462699999998,15.323228000000029,15.434033999999997,15.44965000000002,15.45765799999998,15.519754999999975,15.53459700000002,15.599244999999996,15.611743999999987,15.636731999999995,15.672317000000021,15.752161999999998,15.753962999999999,15.835087999999985,16.102216,16.126821000000007,16.12912,16.158558000000028,16.169849999999997,16.178314,16.188782000000003,16.251914,16.32066900000001,16.33669900000001,16.339541999999994,16.38289900000001,16.408960999999977,16.430653000000007,16.437236999999982,16.44171399999999,16.506533999999988,16.60108200000002,16.630889000000025,16.63222300000001,16.64343200000002,16.661643000000026,16.66319199999998,16.71718199999998,16.729517999999985,16.786464000000024,16.796617000000026,16.80394100000001,16.80713800000001,16.811587999999972,16.82970899999998,16.83151700000002,16.854597000000012,16.913752999999986,16.96798100000001,17.025273000000027,17.02839799999998,17.03959900000001,17.19691899999998,17.388582999999983,17.426383999999985,17.633208000000025,17.72530999999998,17.7765,17.925899000000015,17.985956999999985,18.03461299999998,18.035158000000024,18.33455600000002,18.554474000000027,18.819136000000015,19.294691,19.326833000000022,19.370652000000007,19.391025000000013,19.50171900000001,19.568479000000025,19.721015000000023,19.742188999999996,2.0741820000000075,2.190782000000013,2.414432999999974,2.763974000000019,2.792461000000003,2.9027659999999855,2.9076390000000174,2.9481509999999957,2.958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output = document.getElementById("output");
output.innerHTML += Math.max(...arr) + '<br />';
output.innerHTML += arr.sort()[arr.length-1] + '<br />';
output.innerHTML += arr.sort()[arr.length-2] + '<br />';
output.innerHTML += arr.sort()[0] + '<br />';

output.innerHTML += '---------------------------------------' + '<br />'

a = [1,2,3,0];
output.innerHTML += Math.max(...a) + '<br />';
output.innerHTML += a.sort()[a.length-1] + '<br />';
output.innerHTML += a.sort()[a.length-2] + '<br />';
output.innerHTML += a.sort()[0] + '<br />';

<html>
  <body>
    <div id='output'></div>
  </body>
</html>

排序数组中的最后一个元素不是最大值吗？

Answer 1

如果要对数字进行排序，则应回拨电话。如果不传递回调，它将sort()作为字符串。根据{{​​3}}

  

默认的sort顺序是基于将元素转换为字符串，然后比较其UTF-16代码单元值的序列。

var array = [1, 10, 100, 20];

array.sort((a, b) => a - b);
console.log(...array);

array.sort();
console.log(...array);

注意：sort()修改原始数组。您正在使用sort()，就像您没有使用它一样。在这种情况下，它可以正常工作，但在其他情况下，则可能会导致问题

Answer 2

以这种方式调用的Math.max将不可靠。来自MDN：

  

但是，如果数组中包含太多元素，则蔓延（...）和apply都将失败或返回错误的结果，因为它们试图将数组元素作为函数参数进行传递。有关更多详细信息，请参见使用应用和内置功能。 reduce解决方案不存在此问题。

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/max