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converters.js
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converters.js
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// Find closest index for a given value
const closest = (array, n) => array.findIndex((elem) => (n <= elem));
export function valueToPosition(value, valuesArray, sliderLength) {
const index = closest(valuesArray, value);
const arrLength = valuesArray.length - 1;
const validIndex = index === -1 ? arrLength : index;
return sliderLength * validIndex / arrLength;
}
export function positionToValue(position, valuesArray, sliderLength) {
var arrLength;
var index;
if (position < 0 || sliderLength < position) {
return null;
} else {
arrLength = valuesArray.length - 1;
index = arrLength * position / sliderLength;
return valuesArray[Math.round(index)];
}
}
export function createArray(start, end, step) {
var i;
var length;
var direction = start - end > 0 ? -1 : 1;
var result = [];
if (!step) {
//console.log('invalid step: ', step);
return result;
} else {
length = Math.abs((start - end) / step) + 1;
for (i = 0; i < length; i++) {
result.push(start + i * Math.abs(step) * direction);
}
return result;
}
}