@fruits-chain/react-native-xiaoshu/lib/module/helpers/format/number.js

React Native UI library

export function range(num, min, max) {
  return Math.min(Math.max(num, min), max);
}

function trimExtraChar(value, char, regExp) {
  const index = value.indexOf(char);

  if (index === -1) {
    return value;
  }

  if (char === '-' && index !== 0) {
    return value.slice(0, index);
  }

  return value.slice(0, index + 1) + value.slice(index).replace(regExp, '');
}

export function formatNumber(value) {
  let allowDot = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
  let allowMinus = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;

  if (allowDot) {
    value = trimExtraChar(value, '.', /\./g);
  } else {
    value = value.split('.')[0];
  }

  if (allowMinus) {
    value = trimExtraChar(value, '-', /-/g);
  } else {
    value = value.replace(/-/, '');
  }

  const regExp = allowDot ? /[^-0-9.]/g : /[^-0-9]/g;
  return value.replace(regExp, '');
}
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