But with Java Script, methods and properties are also available to primitive values, because Java Script treats primitive values as objects when executing methods and properties.In Java Script, a number can be a primitive value (typeof = number) or an object (typeof = object).The value Of() method is used internally in Java Script to convert Number objects to primitive values.

validating number in javascript-28

Unlike many other programming languages, Java Script does not define different types of numbers, like integers, short, long, floating-point etc.

Java Script numbers are always stored as double precision floating point numbers, following the international IEEE 754 standard.

Primitive values (like 3.14 or 2014), cannot have properties and methods (because they are not objects).

I found this code in some website, and it works perfectly. \d{3}())" (() the middle parenthesis was actually seen as part of the regex syntax and not characters to be looked for.

It validates that the phone number is in one of these formats: (123) 456-7890 or 123-456-7890 The problem is that my client (I don't know why, maybe client stuffs) wants to add another format, the ten numbers consecutively, something like this: 1234567890.

I'm using this regular expression, First off, your format validator is obviously only appropriate for NANP (country code +1) numbers. Will your application be used by someone with a phone number from outside North America? Finally, I get the feeling you're validating user input in a web browser. If so, you don't want to prevent those people from entering a perfectly valid [international] number. Remember that client-side validation is only a convenience you provide to the user; you still need to validate all input (again) on the server. This is a very loose option and I prefer to keep it this way, mostly I use it in registration forms where the users need to add their phone number. TL; DR don't use a regular expression to validate complex real-world data like phone numbers or URLs. You mean match(/\d/g) not match(/\d/) or the length will be 1, not 10; also, the match on an empty string is null. Usually users have trouble with forms that enforce strict formatting rules, I prefer user to fill in the number and the format it in the display or before saving it to the database. \d{4} and the target string (123) 456-7890 but for some reason it's only grabbing the last 7 digits. At the very least it should be var m = value.match(/\d/g); return m && m.length === 10This led me in the right direction. Unfortunately this expression will also match (1234567890 and 123)4567890. If you want to match at word boundaries, just change the ^ and $ to \b I welcome any suggestions, corrections, or criticisms of this solution. As far as I can tell, this matches the NANP format (for USA numbers - I didn't validate other North American countries when creating this), avoids any 911 errors (can't be in the area code or region code), eliminates only those 555 numbers which are actually invalid (region code of 555 followed by 01xx where x = any number). I'm checking your suggestion using "The Regex Coach." I'm using the regex (()?