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Completed 2.8 (phonebook step3)
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@@ -2,26 +2,37 @@ import React, { useState } from 'react'
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const App = () => {
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const [ persons, setPersons ] = useState([
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{ name: 'Arto Hellas' }
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{ name: 'Arto Hellas',
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number: '040-123457',
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id: 1
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}
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])
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const [ newName, setNewName ] = useState('')
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const [ newNumber, setNewNumber ] = useState('')
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const handleNameChange = (event) => {
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//console.log(event.target.value)
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setNewName(event.target.value)
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}
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const handleNumberChange = (event) => {
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//console.log(event.target.value)
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setNewNumber(event.target.value)
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}
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const submitChange = (event) => {
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event.preventDefault()
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const newPerson = {
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name: newName
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name: newName,
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number: newNumber,
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id: persons.length + 1
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}
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// Check if newName already added to phonebook or not
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const check = persons.filter(person => person.name === newName )
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check.length === 0 ? setPersons(persons.concat(newPerson)) : alert(`${newName} is already added to phonebook`)
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setNewNumber('')
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setNewName('')
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}
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@@ -32,6 +43,8 @@ const App = () => {
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<div>
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name: <input value={newName} onChange={handleNameChange}/>
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</div>
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<div>number: <input type="tel" value={newNumber} onChange={handleNumberChange}/>
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</div>
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<div>
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<button type="submit">add</button>
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</div>
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@@ -39,7 +52,7 @@ const App = () => {
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<h2>Numbers</h2>
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<ul>
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{persons.map(person => <li key={person.name}>{person.name}</li>)}
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{persons.map(person => <li key={person.id}>{person.name}: {person.number}</li>)}
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</ul>
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</div>
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)
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