IPSUM- JOSE GUERRA

gistfile1.txt

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// OPTIMIZACION DE CODIGO 
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//Problema 1
//Suponiendo que el modulo implementado de HTTP es de la libreria por defecto de NODEJS

const HTTP = require('http')
let getSomeData = (url_api) => {
  return new Promise((resolve, reject) => {
    HTTP.get(url_api, (res) => {
      res.setEncoding('utf8');
      let rawData = '';
      res.on('data', (chunk) => {
        rawData += chunk.toString();
      });
      res.on('end', () => resolve(rawData));
      res.on('error', (error) => reject(error));
    })
  })
}

getSomeData('http://jsonplaceholder.typicode.com/users').then(data => this.renderDataAtDom(data))
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//otra posible solucion suponiendo que este bloque de codigo se ejecute dentro de una funcion async
let getSomeData = ( url_api ) => {
let res = HTTP.get( url_api )
return res
}
let data = await getSomeData( 'http://localhost:8080/api/users' )
this.renderDataAtDom( data )
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//problema 2
// asumiendo que data es un iterable y que el getSomeData es un array no es necesario iterar
// por lo cual se puede asignar el valor de manera inmediata
let data = getSomeData( 'http://localhost:8080/api/users' )
data.some_attribute = ( data.age/2 )
this.renderAtDom( data )

//Sin remover el For la mejor optimizacion es eliminar la operacion que esta demas
let data = getSomeData( 'http://localhost:8080/api/users' )
for( let i = 0; i < data.length; i++ ){
  data.some_attribute = ( data.age/2 ) // se remueve operacion innecesaria
}
this.renderAtDom( data )


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// CICLOS DE VIDA
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// SIN RESOLVER

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// OPERADORES ES6
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//Problema 1
const problem1 = () => {
  const admins = []
  let data = getSomeData('http://localhost:8080/api/users')
  data.map((el) => {
    if (el.role === 'admin') admins.push(el)
  })
  return admins
}
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//problema 2
class MyComponent {
  public data: Array<Object>;
  public some_attribute: string;
  async constructor() {
    let info = await this.getSomeData(
      'http://localhost:8080/api/users')
    let check = (data) => {
      this.some_attribute = data.some_attribute
    }
    check(info)
  }
}
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// Problema 3
const problem3 = () => {
  let array_one = [1, 2, 3, 4]
  let array_two = [5, 6, 7, 8]
  let joined_array = [...array_one, ...array_two]

  let object_one = { attr: 1, attr_two: 2 }
  let object_two = { attr_three: 3, attr_four: 4 }
  let joined_object = { ...object_one, ...object_two }

  return {
    joined_array,
    joined_object
  }
}
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// Problema 4
const problem4 = () => {
  const randomValue = () => {
    const values = [true, false]
    return values[Math.floor(Math.random() * values.length)]
  }

  let array_from_api_users = [
    {
      name: 'Postulante 1',
      main_tech: ['JS', 'Java']
    },
    {
      name: 'Postulante 2',
      main_tech: ['JS', 'Java', 'Python']
    }
  ]
  const users_joined = array_from_api_users.map(user => ({ ...user, show_info: randomValue() }))
  return users_joined.filter(user => user.show_info === false)
}