[utility] type check - Githubissues

Description :memo:

To Do :mag:

function getType(target) {
  return Object.prototype.toString.call(target).slice(8, -1);
}

function isString(target) {
  return getType(target) === 'String';
}

function isNumber(target) {
  return getType(target) === 'Number';
}

function isBoolean(target) {
  return getType(target) === 'Boolean';
}

function isNull(target) {
  return getType(target) === 'Null';
}

function isUndefined(target) {
  return getType(target) === 'Undefined';
}

function isObject(target) {
  return getType(target) === 'Object';
}

function isArray(target) {
  return getType(target) === 'Array';
}

function isDate(target) {
  return getType(target) === 'Date';
}

function isRegExp(target) {
  return getType(target) === 'RegExp';
}

function isFunction(target) {
  return getType(target) === 'Function';
}

function isNumber(x: any): x is number {
  return typeof x === "number";
}

function isString(x: any): x is string {
  return typeof x === "string";
}

function padLeft(value: string, padding: string | number) {
  if (isNumber(padding)) {
    return Array(padding + 1).join(" ") + value;
  }
  if (isString(padding)) {
    return padding + value;
  }
  throw new Error(`Expected string or number, got '${padding}'.`);
}

gloriaJun / gloria-libs

[utility] type check #21

Description :memo:

To Do :mag:

References