# [RESOLVED] Converting 2-d array into array of objects.

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• 02-16-2012, 10:07 PM
wbport
[RESOLVED] Converting 2-d array into array of objects.
I have the following in a withholding tax calculation page:
Code:

```var EXEMPT = 3800;        // May change in later years, see Publication 15, Circular E, Employer's Tax Guide from the IRS var STable = [ // Define Single Table         [    0,        0,  0],  // Range, base, percentage         [  2150,        0, .10],         [ 10850,  870.00, .15],  // With >= 10850 & < 37500, tax is \$870.00 + 15% of the amount over \$10850         [ 37500,  4867.50, .25],         [ 87800, 17442.50, .28],         [180800, 43482.50, .33],         [390500, 112683.50, .35]        // Note: no comma at end ]; ......................................   for (var exmp=0; exmp < 8; exmp++) {     var WkAmt = AnnAmt - EXEMPT * exmp;     for (i=0; (i < (STable.length - 1)) && (WkAmt > STable[i+1][0]) ; i++) ;  //Search Singles table for proper bracket.     var AnnTax = STable[i][1] + (WkAmt - STable[i][0]) * STable[i][2];         document.tax2012.elements[TableSub++].value = Nformat(AnnTax / NoPeriods);   }```
The 2nd subscript indicates what field is used and is always constant. How can I change this into a one dimension table of objects with three fields/properties? TIA

BTW, this is the website: tax12.html.
• 02-17-2012, 11:43 AM
007Julien
This could be respond to your question
Code:

```<script type="text/javascript"> var STable = [ // Define Single Table         [    0,        0,  0],  // Range, base, rate         [  2150,        0, .10],         [ 10850,  870.00, .15],  // With >= 10850 & < 37500, tax is \$870.00 + 15&#37; of the amount over \$10850         [ 37500,  4867.50, .25],         [ 87800, 17442.50, .28],         [180800, 43482.50, .33],         [390500, 112683.50, .35]        // Note: no comma at end ]; // To allows alert (which call a toString() function) with object like with tables Object.prototype.toString=function(){var i,c='\n';for (i in this) c+='\nkey '+i+' => value '+this[i];return c} // A constructor function Obj(range,base,rate){this.range=range;this.base=base;this.rate=rate;} // A loop to build an unidimensional Array of objects var STableObj=[]; for (var i=0;i<STable.length;i++) STableObj[STableObj.length]=new Obj(STable[i][0],STable[i][1],STable[i][2]); // The result alert(STableObj) // this table seems to use like this var amount=40000,availableBracket=STableObj.length-1; while (availableBracket && amount<STableObj[availableBracket].range) availableBracket--; alert(availableBracket) tax = STableObj[availableBracket].base+(amount-STableObj[availableBracket].range)*STableObj[availableBracket].rate alert(tax) </script>```
• 02-17-2012, 11:51 AM
nap0leon
For creating a custom object with that data, this works.
Or are you looking for code that does the conversion? (e.g., you are forced to receive the information as a 2D array but prefer to work with an single array of objects instead?

Code:

```<script> function taxTable(range,base,percentage){         this.range = range;         this.base = base;         this.percentage = percentage; } arrSTable = new Array(); arrSTable[0] = new taxTable("0","0","0"); arrSTable[1] = new taxTable("2150","0",".10"); arrSTable[2] = new taxTable("10850","870.00",".15"); arrSTable[3] = new taxTable("37500","4867.50",".25"); arrSTable[4] = new taxTable("87800","17442.50",".28"); arrSTable[5] = new taxTable("180800","43482.50",".33"); arrSTable[6] = new taxTable("390500","112683.50",".35"); for (i=0; i<arrSTable.length;i++){         document.write ("<p>Range: " + arrSTable[i].range + ", Base: " + arrSTable[i].base + ", Percentage: " + arrSTable[i].percentage + "</p>"); } </script>```
• 02-17-2012, 02:52 PM
wbport
I've never worked with objects except in a "class" and this is a first chance to plunge in. The tables don't change for a year so I can use any method that works to load them. A 2-d table makes sense when each element contains the same type of data.

Plenty of food for thought--thanks people for looking into it.
• 02-28-2012, 07:10 PM
wbport
Done. Link is on the first message.

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