Filtering out a name starting with letter 'P' from Array of objects using typescript-CodePudding

Here's my code:

const names = [
    {name:'Finn',age: 23},
    {name:'Presten',age: 24},
    {name:'Pearl',age: 21},
    {name:'Tim',age: 22},
    {name:'Jade',age: 25},
    {name:'Princess',age: 23},
] 
const filterName = names.filter(function(nameWithOutC: {name: string, age: number}): boolean {
    return nameWithOutP.book !== 'P'
})

console.log('Filtering out a name starting with letter P')
console.log(filterName)

I am trying to figure out how can able to filter out the names starting with the letter "P".

CodePudding user response：

You can use something like this to get rid of strings starting with the letter "P":

bookstore.filter((name, age) => !name.startsWith("P"))

Or this to only keep strings with the starting letter "P":

bookstore.filter((name, age) => name.startsWith("P"))

CodePudding user response：

by placing search you can search for any word in the string, of course using the filter method, you can also negate it:

!name.search("P")

const names = [
        { name: "Finn", age: 23 },
        { name: "Presten", age: 24 },
        { name: "Pearl", age: 21 },
        { name: "Tim", age: 22 },
        { name: "Jade", age: 25 },
        { name: "Princess", age: 23 }
      ];
      const filterName = names.filter(({ name }) => name.search("P"));
    
      console.log("Filtering out a name starting with letter P");
      console.log(filterName);