TypeScript isNumber.default函数代码示例

  const vmSeries = timeSeries.map((item, index) => {
    const colorIndex = index % colors.length;
    const label = item.target;
    const result = [];

    // stat defaults
    let total = 0;
    let max: TimeSeriesValue = -Number.MAX_VALUE;
    let min: TimeSeriesValue = Number.MAX_VALUE;
    let logmin = Number.MAX_VALUE;
    let avg: TimeSeriesValue = null;
    let current: TimeSeriesValue = null;
    let first: TimeSeriesValue = null;
    let delta: TimeSeriesValue = 0;
    let diff: TimeSeriesValue = null;
    let range: TimeSeriesValue = null;
    let timeStep = Number.MAX_VALUE;
    let allIsNull = true;
    let allIsZero = true;

    const ignoreNulls = nullValueMode === NullValueMode.Ignore;
    const nullAsZero = nullValueMode === NullValueMode.AsZero;

    let currentTime: TimeSeriesValue = null;
    let currentValue: TimeSeriesValue = null;
    let nonNulls = 0;
    let previousTime: TimeSeriesValue = null;
    let previousValue = 0;
    let previousDeltaUp = true;

    for (let i = 0; i < item.datapoints.length; i++) {
      currentValue = item.datapoints[i][0];
      currentTime = item.datapoints[i][1];

      if (typeof currentTime !== 'number') {
        continue;
      }

      if (currentValue !== null && typeof currentValue !== 'number') {
        throw { message: 'Time series contains non number values' };
      }

      // Due to missing values we could have different timeStep all along the series
      // so we have to find the minimum one (could occur with aggregators such as ZimSum)
      if (previousTime !== null && currentTime !== null) {
        const currentStep = currentTime - previousTime;
        if (currentStep < timeStep) {
          timeStep = currentStep;
        }
      }

      previousTime = currentTime;

      if (currentValue === null) {
        if (ignoreNulls) {
          continue;
        }
        if (nullAsZero) {
          currentValue = 0;
        }
      }

      if (currentValue !== null) {
        if (isNumber(currentValue)) {
          total += currentValue;
          allIsNull = false;
          nonNulls++;
        }

        if (currentValue > max) {
          max = currentValue;
        }

        if (currentValue < min) {
          min = currentValue;
        }

        if (first === null) {
          first = currentValue;
        } else {
          if (previousValue > currentValue) {
            // counter reset
            previousDeltaUp = false;
            if (i === item.datapoints.length - 1) {
              // reset on last
              delta += currentValue;
            }
          } else {
            if (previousDeltaUp) {
              delta += currentValue - previousValue; // normal increment
            } else {
              delta += currentValue; // account for counter reset
            }
            previousDeltaUp = true;
          }
        }
        previousValue = currentValue;

        if (currentValue < logmin && currentValue > 0) {
          logmin = currentValue;
//.........这里部分代码省略.........

export function guessFieldTypeFromValue(v: any): FieldType {
  if (isNumber(v)) {
    return FieldType.number;
  }

  if (isString(v)) {
    if (NUMBER.test(v)) {
      return FieldType.number;
    }

    if (v === 'true' || v === 'TRUE' || v === 'True' || v === 'false' || v === 'FALSE' || v === 'False') {
      return FieldType.boolean;
    }

    return FieldType.string;
  }

  if (isBoolean(v)) {
    return FieldType.boolean;
  }

  if (v instanceof Date || isDateTime(v)) {
    return FieldType.time;
  }

  return FieldType.other;
}

export function sortSeriesData(data: SeriesData, sortIndex?: number, reverse = false): SeriesData {
  if (isNumber(sortIndex)) {
    const copy = {
      ...data,
      rows: [...data.rows].sort((a, b) => {
        a = a[sortIndex];
        b = b[sortIndex];
        // Sort null or undefined separately from comparable values
        return +(a == null) - +(b == null) || +(a > b) || -(a < b);
      }),
    };

    if (reverse) {
      copy.rows.reverse();
    }

    return copy;
  }
  return data;
}

function doStandardCalcs(data: SeriesData, fieldIndex: number, ignoreNulls: boolean, nullAsZero: boolean): FieldCalcs {
  const calcs = {
    sum: 0,
    max: -Number.MAX_VALUE,
    min: Number.MAX_VALUE,
    logmin: Number.MAX_VALUE,
    mean: null,
    last: null,
    first: null,
    count: 0,
    nonNullCount: 0,
    allIsNull: true,
    allIsZero: false,
    range: null,
    diff: null,
    delta: 0,
    step: Number.MAX_VALUE,

    // Just used for calcutations -- not exposed as a stat
    previousDeltaUp: true,
  } as FieldCalcs;

  for (let i = 0; i < data.rows.length; i++) {
    let currentValue = data.rows[i][fieldIndex];

    if (currentValue === null) {
      if (ignoreNulls) {
        continue;
      }
      if (nullAsZero) {
        currentValue = 0;
      }
    }

    if (currentValue !== null) {
      const isFirst = calcs.first === null;
      if (isFirst) {
        calcs.first = currentValue;
      }

      if (isNumber(currentValue)) {
        calcs.sum += currentValue;
        calcs.allIsNull = false;
        calcs.nonNullCount++;

        if (!isFirst) {
          const step = currentValue - calcs.last!;
          if (calcs.step > step) {
            calcs.step = step; // the minimum interval
          }

          if (calcs.last! > currentValue) {
            // counter reset
            calcs.previousDeltaUp = false;
            if (i === data.rows.length - 1) {
              // reset on last
              calcs.delta += currentValue;
            }
          } else {
            if (calcs.previousDeltaUp) {
              calcs.delta += step; // normal increment
            } else {
              calcs.delta += currentValue; // account for counter reset
            }
            calcs.previousDeltaUp = true;
          }
        }

        if (currentValue > calcs.max) {
          calcs.max = currentValue;
        }

        if (currentValue < calcs.min) {
          calcs.min = currentValue;
        }

        if (currentValue < calcs.logmin && currentValue > 0) {
          calcs.logmin = currentValue;
        }
      }

      if (currentValue !== 0) {
        calcs.allIsZero = false;
      }

      calcs.last = currentValue;
    }
  }

  if (calcs.max === -Number.MAX_VALUE) {
    calcs.max = null;
  }

  if (calcs.min === Number.MAX_VALUE) {
    calcs.min = null;
  }

  if (calcs.step === Number.MAX_VALUE) {
    calcs.step = null;
  }
//.........这里部分代码省略.........