在 javascript 中将数字数组转换为 String()

Question

请不要因为我提出 "dumb" 问题而责备我，但我已经为此苦苦挣扎了数周！

为什么即使在我使用 toString() 将值转换为字符串后，此数组仍保留我的前导零并将 numbers 转换为不同的格式？

var coords=new Array();
coords[0]=new Array(03336890,"SPOON RIVER NEAR ST. JOSEPH, IL");
coords[1]=new Array(03346500,"EMBARRAS RIVER AT LAWRENCEVILLE, IL");
coords[2]=new Array(03612600,"OHIO RIVER AT OLMSTED");
coords[3]=new Array(05543010,"ILLINOIS RIVER AT SENECA, IL");
coords[4]=new Array(05554300,"INDIAN CREEK NEAR FAIRBURY, IL");
coords[5]=new Array(05576100,"LICK CREEK NEAR WOODSIDE, IL");
coords[6]=new Array(05576195,"SUGAR CREEK NEAR CHATHAM, IL");
coords[7]=new Array(05586300,"ILLINOIS RIVER AT FLORENCE, IL");
coords[8]=new Array(05599490,"BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, IL");
coords[9]=new Array(411955088280601,"HANSON GRAVEL PIT AT CULVERT NEAR MORRIS, IL");

for (i=0;i<coords.length;i++){
    coords[i][0].toString();
}

查看 jsfiddle

上的结果

Answer 1

在引号中设置数字而不是数字。

var coords=new Array();
coords[0]=new Array("03336890","SPOON RIVER NEAR ST. JOSEPH, IL");
coords[1]=new Array("03346500","EMBARRAS RIVER AT LAWRENCEVILLE, IL");
...

Answer 2

这里的问题是您将值保存为数字。 javascript 自动将它们保存在没有前导零的内部，因此在您甚至对它们调用 .toString() 之前它们就会丢失。我用你给定的例子给你做了一个解决方法使用了一个小技巧来给你返回前导零。当然，如果需要，这需要一些改进：

var i, x = 100

var coords = new Array();
coords[0] = new Array(03336890, "SPOON RIVER NEAR ST. JOSEPH, IL");
coords[1] = new Array(03346500, "EMBARRAS RIVER AT LAWRENCEVILLE, IL");
coords[2] = new Array(03612600, "OHIO RIVER AT OLMSTED");
coords[3] = new Array(05543010, "ILLINOIS RIVER AT SENECA, IL");
coords[4] = new Array(05554300, "INDIAN CREEK NEAR FAIRBURY, IL");
coords[5] = new Array(05576100, "LICK CREEK NEAR WOODSIDE, IL");
coords[6] = new Array(05576195, "SUGAR CREEK NEAR CHATHAM, IL");
coords[7] = new Array(05586300, "ILLINOIS RIVER AT FLORENCE, IL");
coords[8] = new Array(05599490, "BIG MUDDY RIVER AT RTE 127 AT MURPHYSBORO, IL");
coords[9] = new Array(411955088280601, "HANSON GRAVEL PIT AT CULVERT NEAR MORRIS, IL");

for (i = 0; i < 10; i++) {
  if (x < 10000000) {
    alert("0" + coords[i]);
  }
}

Link 到 jsfiddle 在这里： https://jsfiddle.net/gyjjqnkt/

在 javascript 中将数字数组转换为 String()

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