20 lines
483 B
JavaScript
20 lines
483 B
JavaScript
var mapRange = function(from, to, s) {
|
|
// mapRange expects ranges generated by _.range
|
|
var a1 = from[0];
|
|
var a2 = from[from.length - 1];
|
|
var b1 = to[0];
|
|
var b2 = to[to.length - 1];
|
|
return b1 + (s - a1) * (b2 - b1) / (a2 - a1);
|
|
};
|
|
|
|
// The range function is exclusive
|
|
var fromRange = _.range(0, 11);
|
|
var toRange = _.range(-1, 1);
|
|
|
|
// .map constructs a new array
|
|
fromRange = fromRange.map(function(s) {
|
|
return mapRange(fromRange, toRange, s);
|
|
});
|
|
|
|
console.log(fromRange);
|