i'm trying to achieve something using Javascript, my current condition is ,i have array that has same value, i need to replace the value to increment number if the value are same.
Here is my sample code
var period = ['202001', '202001', '202001', '202002', '202002', '202003', '202003', ...];
The result i'm expecting is
var period = ['0', '0', '0', '1', '1', '2', '2'];
The real case is, i want to produce a heatmap using highcharts, but i need to convert the year-month into xy coordinates.
Do you have any best suggestion about how do i solve this ?
Many Thanks...
Have a look below;
var period = ['202001', '202001', '202001', '202002', '202002', '202003', '202003', ];
let prevString = period[0];
let lastNumber = 0;
let reqArr = period.map(string => {
if (string == prevString) {
return lastNumber.toString();
} else {
prevString = string;
lastNumber+=1
return lastNumber.toString();
}
})
console.log(reqArr);