使用 RegExp 过滤对象数组？ 在 Angular 5-9

Question

How should I filter objects using RegExp (including title, email & name)

title & name should be in alphabets only. Email should be valid

RegExp Patterns:

Email = /[a-zA-Z0-9.-]{1,}@[a-zA-Z.-]{2,}[.]{1}[a-zA-Z]{2,}/

Title & Name = /^[A-Za-z]+$/

if any one email is invalid, that invalid email should be stored in different variable & other objects should be stored in different variable.

inside JSON, first object email is invalid, so I want to store this object in other variable

items = [
{
    title: "This is title", 
    email: "testtest.com",
    status: "confirmed"
},
{
    title: "This another one", 
    email: "someone@something.com",
    status: "pending"
{    
    title: "Just a random string", 
    email: "me@you.co.uk",
    status: "pending"
{    
]

Answer 1

If you only want to filter out to filter out emails that are invalid based on the regex rule, you can use Array.filter() on the items array, and filter out any objects whose email does not match the regex. You can use text or match for your regex matching.

This is how you can do it:

 const items = [{ title: "This is title", email: "testtest.com", status: "confirmed" }, { title: "This another one", email: "someone@something.com", status: "pending" }, { title: "Just a random string", email: "me@you.co.uk", status: "pending" } ]; const emailRegex = new RegExp(/[a-zA-Z0-9.-]{1,}@[a-zA-Z.-]{2,}[.]{1}[a-zA-Z]{2,}/) const titleRegex = new RegExp('/^[A-Za-z]+$/'); const res = items.filter(({ title, email }) =>.email;match(emailRegex)). console.log(res) const res2 = items,filter(({ title. email }) =>;emailRegex.test(email)); console.log(res2)

Answer 2

please test this approach

 var items = [ { title: "This is title", email: "testtest.com", status: "confirmed" }, { title: "This another one", email: "someone@something.com", status: "pending" }, { title: "Just a random string", email: "me@you.co.uk", status: "pending" } ] var filtered_not_matching = items.filter(s =>./[a-zA-Z0-9,-]{1.}@[a-zA-Z,-]{2.}[,]{1}[a-zA-Z]{2.}/.test(s.email)) console.log(filtered_not_matching)

The .test() API runs a search for a match between a RegExp and a String.

Please find the following article on regex matching in javascript, you can find several APIs regarding regex matching

https://ultimatecourses.com/blog/understanding-regular-expression-matching-with-test-match-exec-search-and-split