delete object not working

ByAnurag batra October 4, 2022September 6, 2022

// define dis-allowed keys and values
const disAllowedKeys = ['_id','__v','password'];
const disAllowedValues = [null, undefined, ''];

// our object, maybe a Mongoose model, or some API response
const someObject = {
  _id: 132456789,
  password: '$1$O3JMY.Tw$AdLnLjQ/5jXF9.MTp3gHv/',
  name: 'John Edward',
  age: 29,
  favoriteFood: null
}; 

// use reduce to create a new object with everything EXCEPT our dis-allowed keys and values!
const withOnlyGoodValues = Object.entries(someObject).reduce((ourNewObject, pair) => {
  const key = pair[0];
  const value = pair[1]; 
  if (
    disAllowedKeys.includes(key) === false &&
    disAllowedValues.includes(value) === false
  ){
    ourNewObject[key] = value; 
  }
  return ourNewObject; 
}, {}); 

// what we get back...
// {
//   name: 'John Edward',
//   age: 29
// }

// do something with the new object!
server.sendToClient(withOnlyGoodValues);

Here is what the above code is Doing:
1. We define an array of dis-allowed keys and values.
2. We define an object that we want to filter.
3. We use reduce to create a new object with only the keys and values we want.
4. We do something with the new object.

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ByAnurag batra October 12, 2022September 6, 2022

window.localStorage.setItem(key, value); window.localStorage.getItem(key); Here is what the above code is Doing: 1. We’re creating a variable called key and assigning it the value of “name”. 2. We’re creating a variable called value and assigning it the value of “John”. 3. We’re using the localStorage.setItem() method to store the key/value pair in localStorage. 4. We’re using…

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ByAnurag batra July 22, 2022June 30, 2022

var canvas = new fabric.Canvas(“test_fabric”); canvas.setDimensions({width:800, height:200}); Here is what the above code is Doing: 1. Create a new canvas object with the id of “test_fabric” 2. Set the dimensions of the canvas to 800×200

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ByAnurag batra July 28, 2022June 30, 2022

import React, { useState } from “react”; import ReactDOM from “react-dom”; function Counter() { const [count, setCount] = useState(0); return ( {count} setTimeout(() => setCount(count + 1), 2000)}> Delayed Counter (basic) setTimeout(() => setCount(x => x + 1), 2000)}> Delayed Counter (functional) setCount(count + 1)}>Immediate Counter ); } const rootElement = document.getElementById(“root”); ReactDOM.render(, rootElement); Here…

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ByAnurag batra July 7, 2022June 30, 2022

$(“#someElement”).fadeOut(100).fadeIn(100).fadeOut(100).fadeIn(100); Here is what the above code is Doing: 1. Fade out the element with id=”someElement” 2. Fade in the element with id=”someElement” 3. Fade out the element with id=”someElement” 4. Fade in the element with id=”someElement”

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how to remove item from asyncstorage

ByAnurag batra July 5, 2022June 30, 2022

async removeItemValue(key) { try { await AsyncStorage.removeItem(key); return true; } catch(exception) { return false; } } Here is what the above code is Doing: 1. We are importing the AsyncStorage module from the react-native package. 2. We are creating a function called getItemValue that takes a key as a parameter. 3. We are using the…

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header logo react native doesn’t show

ByAnurag batra September 19, 2022September 6, 2022

Here is what the above code is Doing: 1. We’re importing the Header component from react-native-elements. 2. We’re creating a Header component and passing in some props. 3. We’re passing in a leftComponent prop, which is an object with an icon and color. 4. We’re passing in a centerComponent prop, which is an object with…

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