Converting a number array toString() in javascript

Question

Please don't barate me for asking an "dumb" question but I've been struggling over this for weeks!

Why does this array leave off my leading zeros and convert the numbers to a different format even after I've used toString() to convert the values to a string?

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();
}

Check out the result on jsfiddle

CodeWizard · Accepted Answer · 2015-12-21 22:56:46Z

2

Set the numbers in a quote instead of numbers.

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");
...

answered Dec 21, 2015 at 22:56

CodeWizard

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2 Comments

daniella Over a year ago

That was so easy it was hard! Thanks for pointing out the obvious! I really needed it!

CodeWizard Over a year ago

Appreciated. Thank you.

Sebastian Weiß · Accepted Answer · 2015-12-21 23:10:30Z

0

The problem here is that you saved the values as a number. javascript automatically saves them internal without the leading zeros, so they get lost before you even call .toString() on them. I made you a workaround with your given example witch uses a little trick to give you back the leading zero. Of course this needs some refinement if needed:

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 to the jsfiddle is here: https://jsfiddle.net/gyjjqnkt/

answered Dec 21, 2015 at 23:10

Sebastian Weiß

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1 Comment

daniella Over a year ago

This doesn't really resolve the problem of the numbers being converted.

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