iter-tools-es/internal/number.js

The iterable toolbox

function isInteger(value, nonZero = false) {
  return typeof value === 'number' && !isNaN(value) && isFinite(value) && !(nonZero && value === 0);
}

exports.isInteger = isInteger;

function isPositiveInteger(value, nonZero = false) {
  return isInteger(value) && (nonZero ? value > 0 : value >= 0);
}

exports.isPositiveInteger = isPositiveInteger;

function isIntegerOrInfinite(value, nonZero = false) {
  return typeof value === 'number' && !isNaN(value) && !(nonZero && value === 0);
}

exports.isIntegerOrInfinite = isIntegerOrInfinite;