Function stringify

_benchmarks/sample_echarts.js:2730–2739

(arrColor, type)

        }
    }
    function stringify(arrColor, type) {
        if (!arrColor || !arrColor.length) {
            return;
        }
        var colorStr = arrColor[0] + ',' + arrColor[1] + ',' + arrColor[2];
        if (type === 'rgba' || type === 'hsva' || type === 'hsla') {
            colorStr += ',' + arrColor[3];
        }
        return type + '(' + colorStr + ')';
    }
    function lum(color, backgroundLum) {
        var arr = parse(color);
        return arr