I have a case where I need to split a range of numbers [1, 60] into ranges that has 11 in each.
I want to push each range into JSON Array, so the expected result would be:
[
{'first: 1, 'last': 11}, // count = 11
{'first: 12, 'last': 22}, // count = 11
{'first: 23, 'last': 33}, // count = 11
{'first: 34, 'last': 44}, // count = 11
{'first: 45, 'last': 55}, // count = 11
{'first: 56, 'last': 60} // the rest, count = 5
]
My code so far:
var count = 11, first = 1, last = 60;
var all = [];
var starter = first;
for(i = first; i <= last; i++){
if(i % count == 0){
all.push({'first': (i - count + (all.length == 0 ? 1 : 0)), 'last': (i-1)});
}
}
console.log(all);
My code return only 5 ranges not 6 as expected and this code not work for all cases like [1, 10] and it return wrong result in many other cases.
var count = 11, first = 1, last = 60;
var all = [];
for(i = first; i <= last; i += count){
var l = i + count - 1;
all.push({'first': i, 'last': l > last ? last : l});
}
console.log(all);
You could take a multiple of count and get the ranges.
function getRanges(first, to, count) {
const result = [];
while (first < to) {
let last = Math.min(to, (Math.floor(first / count) + 1) * count);
if (last + 1 === to) last = to;
result.push({ first, last });
first = last + 1;
}
return result;
}
console.log(getRanges(1, 60, 11));
console.log(getRanges(1, 11, 5));.as-console-wrapper { max-height: 100% !important; top: 0; }