创建到本地存储的javascript数组未返回所需结果

Question

我正在尝试创建一个包含一些齿轮箱值的本地存储数组，然后我需要用它来对特定的array.value进行更多的计算。我遇到的问题是，创建的条目只返回2个数组条目，尽管所有条目都在那里，但“在开头，然后在倒数第二个条目，然后在最后一个条目之前和之后。以下是生成的值。spd_Dev = ["202.391,172.876,120.451,102.601,85.173,72.664,61.701,52.706,45.116,38.510,32.326,27.407,22.910,19.536,16.585,14.195,12.228","10.401"]当我使用固定数组时，我将其输入为：

var spd_Dev = [202.391, 172.876, 120.451, 102.601, 85.173, 72.664, 61.701, 52.706, 45.116, 38.510, 32.326, 27.407, 22.910, 19.536, 16.585, 14.195, 12.228, 10.401];

所以我的问题是如何将这些值写入本地存储，并再次从本地存储读取，这样我就可以将这些值作为数组使用。

这就是我想要做的。

var D_RatioId = data.truck.make + data.truck.model + "D_Ratio"
var G_RatioId = data.truck.make + data.truck.model + "G_Ratio"

var fGr = data.truck.forwardGears;
var gr = data.truck.displayedGear;
var Rpm = data.truck.engineRpm * 100;
var spd = data.truck.speed;
var T_Dia = 1008.3;


if (localStorage.getItem(G_RatioID) == undefined) {
    localStorage.setItem(G_RatioID, '');
    var fG_Rat = [localStorage.getItem(G_RatioID)];
} else {
    var fG_Rat = [localStorage.getItem(G_RatioID)];
}

var spd_Dev = localStorage.getItem(Spd_DevId);
spd_Dev = spd_Dev ? spd_Dev.split(', ') : [];

if (localStorage.getItem("i") == undefined) {
    localStorage.setItem("i", 1);
    var i = localStorage.getItem("i");
} else {
    var i = localStorage.getItem("i");
}
if (i <= fGr && spd > 0.5) {
    if (i <= fGr + 1) {
        if (i == gr) {
            if (RPM > 1450) {
                var G_Ratio = Math.abs(Rpm / D_Ratio * (Math.PI * T_Dia / 1000) * 60 / spd / 1000, 2).toFixed(2);
                var spd_D = Math.abs(RPM / (RPM / G_Ratio / D_Ratio * (Math.PI * T_Dia / 1000) * 60 / 1000) * 0.821932).toFixed(3); 
                fG_Rat.push(G_Ratio);
                spd_Dev.push(spd_D);
                i++;
                localStorage.setItem("i", i);
                var G_RatioValue = fG_Rat;
                var Spd_DevValue = spd_Dev;
                SetG_Ratio(G_RatioID, G_RatioValue);
                SetSpd_Dev(Spd_DevId, Spd_DevValue);
                localStorage.setItem("spd_Dev", JSON.stringify(Spd_DevValue));
            }
        }
    }
}

function SetG_Ratio(G_RatioID, G_RatioValue) {
localStorage.setItem(G_RatioID, G_RatioValue);
console.log(G_RatioID, G_RatioValue);
}

function SetSpd_Dev(Spd_DevId, Spd_DevValue) {
localStorage.setItem(Spd_DevId, Spd_DevValue.toString());
console.log(Spd_DevId, Spd_DevValue, Spd_DevValue.length);
}
    if (spd >= 0) {
    var spd_Dev = [localStorage.getItem(Spd_DevId)];
    var spD_D = JSON.parse(spd_Dev);
    for (i = 1; i < (fGr + 1); i++) { // Some more code dependant on the above results //

Answer 1

为什么不使用LSM.js呢？它会让一切变得更简单。您可以将数组作为数组，这样它将只返回完整的数组，您将不需要使用split()，

https://github.com/kevinj045/LSM_js

​

var lsm = new LSM("G_RatioID");
    var G_RatioValue ["202.391,172.876,120.451,102.601,85.173,72.664,61.701,52.706,45.116,38.510,32.326,27.407,22.910,19.536,16.585,14.195,12.228","10.401"];
    lsm.set("G_RatioID",G_RatioValue);

    console.log(lsm.get("G_RatioID")); // it will return the full array

​