type
Type checking tool for javascript, testing in node.js v8.9.4 using mocha.
Every isType(o)
function has a match function call isNotType(o)
, which simply equals to !isType()
.
usage
var type = require('type');
type.isInteger(2); // true
type.isNotInteger(2); // false
API
Most of the checking function simply use typeof
or instanceof
, nothing fancy.
-
isUndefined(o) & isNotUndefined(o)
-
isNull(o) & isNotNull(o)
-
isAccessible(o) & isNotAccessible(o) o is accessible while it is not null or undefined.
-
isNaN(o) & isNotNaN(o)
-
isNumber(o) & isNotNumber(o) NaN is NOT A NUMBER.
-
isFinite(o) & isNotFinite(o)
Simply use isFinite()
in js to check, therefore, if the argument you pass is not a number, make sure you know how it work.
if you want to check if o is a finite number, use isFiniteNumber(o)
.
-
isFiniteNumber(o) & isNotFiniteNumber(o)
-
isString(o) & isNotString(o)
-
isFunction(o) & isNotFunction(o)
-
isArray(o) & isNotArray(o)
Same as Array.isArray(o)
-
isBoolean(o) & isNotBoolean(o)
-
isInteger(o) & isNotInteger(o) If the decimal part is 0, it is still regarded as an integer.
type.isInteger(1.00); // true
- isIntegerInString(o) & isNotIntegerInString(o) Check if o is a integer in string. If it has a decimal point, it is not a integer. Scientific notation is not supported in these functions yet.
type.isIntegerInString('1.0000'); // false
type.isIntegerInString('23'); // true
Any illegal character is unacceptable:
type.isIntegerInString(" 1.00"); // false
type.isIntegerInString("1.00a"); // false
- isFloat(o) && isNotFloat(o)
If the decimal part is 0, string or number, it is regarded as an integer, not float.
type.isFloat(1.00); // false
- isFloatInString(o) && isNotFloatInString(o)
Check string o if it contains a float, any illegal character will cause a false result;
Scientific notation is not supported in these function yet.
type.isFloatInString("-2.1"); // true
type.isFloatInString("2."); // = 2.0, true
type.isFloatInString(".1"); // = 0.1, true
type.isFloatInString("."); // = 0.0, true
type.isFloatInString(" .1"); // false, sapce is illegal as well
type.isFloatInString("2.1a"); // false
-
isBuffer(o) && isNotBuffer(o)
-
isError(o) && isNotError(o)
- isAssertionError(o) & isNotAssertionError(o)
- isSyntaxError(o) & isNotSyntaxError(o)
- isRangeError(o) && isNotRangeError(o)
- isReferenceError(o) && isNotReferenceError(o)
- isTypeError(o) && isNotTypeError(o)
-
isDate(o) && isNotDate(o)
if o is a string or an instance of Date that will be accepted by Date.parse()
, isDate(o)
returns true;
Therefore, time is not acceptable.
type.isDate("12:00:00"); // false;
-
isRegExp(o) & isNotRegExp(o)
-
isObject(o) & isNotObject(o)
NOTE: Function is an object.
type.isObject(()=>{}); // true