How to combine an array in javascript
Hello I want to merge a array based on the unique item in the array.
The object that I have
totalCells = []
In this totalCells array I have several objects like this
totalCells = [
{
cellwidth: 15.552999999999999,
lineNumber: 1
},
{
cellwidth: 14,
lineNumber: 2
},
{
cellwidth: 14.552999999999999,
lineNumber: 2
},
{
cellwidth: 14,
lineNumber: 1
}
];
Now I want to make a array where I have combination of array based on the lineNumber.
Like I have a object with lineNumber property and cellWidth collection. Can I do this ?
I can loop through each row and check if the line number is same and then push that cellwidth. Is there any way that I can figure ?
I'm trying to get an output like this.
totalCells = [
{
lineNumber : 1,
cells : [15,16,14]
},
{
lineNumber : 2,
cells : [17,18,14]
}
]
Answers:
var newCells = [];
for (var i = 0; i < totalCells.length; i++) {
var lineNumber = totalCells[i].lineNumber;
if (!newCells[lineNumber]) { // Add new object to result
newCells[lineNumber] = {
lineNumber: lineNumber,
cellWidth: []
};
}
// Add this cellWidth to object
newcells[lineNumber].cellWidth.push(totalCells[i].cellWidth);
}
What about something like this :
totalCells.reduce(function(a, b) {
if(!a[b.lineNumber]){
a[b.lineNumber] = {
lineNumber: b.lineNumber,
cells: [b.cellwidth]
}
}
else{
a[b.lineNumber].cells.push(b.cellwidth);
}
return a;
}, []);
Hope this helps!
Do you mean something like this?
var cells = [
{
cellwidth: 15.552999999999999,
lineNumber: 1
},
{
cellwidth: 14,
lineNumber: 2
},
{
cellwidth: 14.552999999999999,
lineNumber: 2
},
{
cellwidth: 14,
lineNumber: 1
}
]
var totalCells = [];
for (var i = 0; i < cells.length; i++) {
var cell = cells[i];
if (!totalCells[cell.lineNumber]) {
// Add object to total cells
totalCells[cell.lineNumber] = {
lineNumber: cell.lineNumber,
cellWidth: []
}
}
// Add cell width to array
totalCells[cell.lineNumber].cellWidth.push(cell.cellwidth);
}