if I define a multi-dimentional javascript array like this
//var myStack = new Array(3);
// *** edit ***
var myStack = {};
What is the best way to insert one value at a time?
myStack[1][1][0] = myValue;
I want to read a database and write one value at a time. Example:
myStack[recordNo][1]['FirstName'] = myValue;
Inserting a single value can be done through one line of code:
myStack[1] = [,[value]];
Or, the long-winded way:
myStack[1] = [];
myStack[1][1] = [];
myStack[1][1][0] = value;
Either method will populate the array myStack with multiple arrays, and finally set the desired value, as requested at the question.
EDIT: As a response to the updated question, the following can be used:
myStack[recordNo] = [,{'FirstName': myValue}];
myStack[recordNo] = {1:{firstName: myValue}}; (or, if all of the keys are dynamic: myStack[recordNo] = {};myStack[recordNo][a] = {firstName: myValue};).To avoid dealing with an array index for every dimensions (which could lead to mistakes if you don't pay attention for a second), you can use a push approach. It makes it easier to read / debug, especially when you have a great number of dimensions :
// some constants for navigation purpose
var FIELD_FNAME=0;
var FIELD_LNAME=1;
var FIELD_JOB=2;
// initialize your stack
var myStack=[];
// create a new row
var row = [];
var fname = "Peter";
row.push(fname);
var lname = "Johnson";
row.push(lname);
var job = "Game Director";
row.push(job);
// insert the row
myStack.push(row);
Then it would be possible to iterate like this :
for (var i=0;i<myStack.length;i++) {
var row = myStack[i];
var fname = row[FIELD_FNAME];
var lname = row[FIELD_LNAME];
var job = row[FIELD_JOB];
}
for example:
var varname={};
for (var k = 0; k < result.rows.length; k++) {
varname[k] =
{
'id': result.rows.item(k).id,
'name': result.rows.item(k).name
};
}
You can use three for loops, if you are inserting all of the values into the array at one time:
for (var i = 0; i < 3; i++) {
for (var j = 0; j < 3; j++) {
for (var k = 0; k < 3; k++) {
myStack[i][j][k] = myValue;
}
}
}
