Function dedupeRealRanges

src/traces/parcoords/axisbrush.js:437–461

(intervals)

}

function dedupeRealRanges(intervals) {
    // Fuses elements of intervals if they overlap, yielding discontiguous intervals, results.length <= intervals.length
    // Currently uses closed intervals, ie. dedupeRealRanges([[400, 800], [300, 400]]) -> [300, 800]
    var queue = intervals.slice();
    var result = [];
    var currentInterval;
    var current = queue.shift();
    while(current) { // [].shift === undefined, so we don't descend into an empty array
        currentInterval = current.slice();
        while((current = queue.shift()) && current[0] <= /* right-open interval would need `<` */ currentInterval[1]) {
            currentInterval[1] = Math.max(currentInterval[1], current[1]);
        }
        result.push(currentInterval);
    }

    if(
        result.length === 1 &&
        result[0][0] > result[0][1]
    ) {
        // discard result
        result = [];
    }

    return result;
}

function makeFilter() {
    var filter = [];