The initial value of the numeric iterator
The inclusive maximum (or minimum when moving backwards) value of the iterator.
Optionalstep: numberThe step size for each iteration, may be positive or negative. Defaults to 1 when start <= end and -1 when start > end. Zero is treated as not provided.
A new iterator which will return a numeric value between start and end at step intervals
let cnt = 0;
iterForOf(createRangeIterator(0, -1, 1), (value) => {
// Will never get called as -1 < 0
});
cnt = 0;
let values: number[] = [];
iterForOf(createRangeIterator(1, 1), (value) => {
cnt++;
values.push(value);
});
// cnt === 1
// values: [ 1 ]
cnt = 0;
values = [];
iterForOf(createRangeIterator(10, null as any), (value) => {
cnt++;
values.push(value);
});
// cnt === 1
// values: [ 10 ]
cnt = 0;
values = [];
iterForOf(createRangeIterator(-10, undefined as any), (value) => {
cnt++;
values.push(value);
});
// cnt === 1
// values: [ -10 ]
cnt = 0;
values = [];
iterForOf(createRangeIterator(5, 20, 5), (value) => {
cnt++;
values.push(value);
});
// cnt === 4
// values: [ 5, 10, 15, 20 ]
cnt = 0;
values = [];
iterForOf(createRangeIterator(20, 5, -5), (value) => {
cnt++;
values.push(value);
});
// cnt === 4
// values: [ 20, 15, 10, 5 ]
cnt = 0;
values = [];
iterForOf(createRangeIterator(20, 15), (value) => {
cnt++;
values.push(value);
});
// cnt === 6
// values: [ 20, 19, 18, 17, 16, 15 ]
cnt = 0;
values = [];
iterForOf(createRangeIterator(-1, 1), (value) => {
cnt++;
values.push(value);
});
// cnt === 3;
// values: [ -1, 0, 1 ]
cnt = 0;
values = [];
iterForOf(createRangeIterator(1, -1), (value) => {
cnt++;
values.push(value);
});
// cnt === 3;
// values: [ 1, 0, -1 ]
Create a simple range iterator which will return an iterator that increments it's value from
starttoendby thestep.endis omitted, null or undefined the value will be set tostartstepvalue is omitted, null, undefined or zero then it will default to 1 if end > start otherwise -1.