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Johnny Simpson

Daily dev tips from fjolt.com - Regular tips to help you improve your development skills.

Education

UCL

v-show vs v-if: Conditional Rendering in Vue

v-show vs v-if: Conditional Rendering in Vue

6
Comments
2 min read

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Checking if a value is a number in Javascript with isNaN()

Checking if a value is a number in Javascript with isNaN()

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Comments 6
4 min read
Javascript Arrays - How to Remove Duplicate Elements

Javascript Arrays - How to Remove Duplicate Elements

2
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1 min read
Javascript Arrays

Javascript Arrays

2
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4 min read
Javascript toLowerCase() - Convert Strings to Lowercase

Javascript toLowerCase() - Convert Strings to Lowercase

2
Comments
1 min read
How to Check if Object is Empty in JavaScript

How to Check if Object is Empty in JavaScript

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2 min read
Javascript Promise.all() - Everything you need to know

Javascript Promise.all() - Everything you need to know

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Comments 1
3 min read
Javascript innerHTML

Javascript innerHTML

2
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2 min read
Centering Elements in CSS with Tailwind

Centering Elements in CSS with Tailwind

4
Comments
2 min read
Getting Started with Redis and Node.JS

Getting Started with Redis and Node.JS

4
Comments
2 min read
Javascript Array Some Method

Javascript Array Some Method

1
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2 min read
Javascript: Check if an Array is a Subset of Another Array

Javascript: Check if an Array is a Subset of Another Array

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Comments 5
1 min read
Javascript Array Every Method

Javascript Array Every Method

17
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3 min read
Creating and Generating UUIDs with Javascript

Creating and Generating UUIDs with Javascript

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3 min read
Javascript Array Concat Method

Javascript Array Concat Method

5
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3 min read
Javascript Immediately invoked function expressions (IIFE)

Javascript Immediately invoked function expressions (IIFE)

12
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2 min read
Javascript loops: for vs forEach vs for.. in vs for.. of

Javascript loops: for vs forEach vs for.. in vs for.. of

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4 min read
Removing the last element of an array in Javascript

Removing the last element of an array in Javascript

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2 min read
Javascript Ordinals: Adding st, nd, rd and th suffixes to a number

Javascript Ordinals: Adding st, nd, rd and th suffixes to a number

9
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2 min read
Git: Renaming a Branch

Git: Renaming a Branch

5
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1 min read
Git Merge: Merging Changes from other Branches

Git Merge: Merging Changes from other Branches

11
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3 min read
Resolving Git Merge Conflicts

Resolving Git Merge Conflicts

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Comments 1
5 min read
A Step by Step Guide to Git Branches

A Step by Step Guide to Git Branches

30
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3 min read
Javascript Shallow Copy - what is a Shallow Copy?

Javascript Shallow Copy - what is a Shallow Copy?

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Comments 14
3 min read
CSS Individual Transform Properties

CSS Individual Transform Properties

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3 min read
Javascript Proxy: Using Javascript Proxies like a Pro

Javascript Proxy: Using Javascript Proxies like a Pro

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Comments 8
7 min read
The Complete Beginners Guide to Getting Started with Git

The Complete Beginners Guide to Getting Started with Git

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6 min read
What are NodeLists, and how do they work?

What are NodeLists, and how do they work?

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3 min read
Javascript Add Event Listener to Multiple Elements

Javascript Add Event Listener to Multiple Elements

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3 min read
Javascript Array Filter Method

Javascript Array Filter Method

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3 min read
Javascript Array Reduce Method

Javascript Array Reduce Method

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4 min read
Javascript Array Slice Method

Javascript Array Slice Method

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3 min read
The Difference between TypeScript and Javascript

The Difference between TypeScript and Javascript

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4 min read
How to get the last element of an Array in Javascript

How to get the last element of an Array in Javascript

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1 min read
Updating Object Key Values with Javascript

Updating Object Key Values with Javascript

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2 min read
Waiting for the DOM to be ready in Javascript

Waiting for the DOM to be ready in Javascript

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2 min read
The Essential Guide to Javascript Sets

The Essential Guide to Javascript Sets

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4 min read
Transporting your Components Anywhere with React Portals

Transporting your Components Anywhere with React Portals

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3 min read
Setting the Default Node.JS version with nvm

Setting the Default Node.JS version with nvm

16
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2 min read
How to count all files in a directory in Linux

How to count all files in a directory in Linux

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Comments 1
1 min read
Python: The Difference Between Sets, Lists, Dictionaries and Tuples

Python: The Difference Between Sets, Lists, Dictionaries and Tuples

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2 min read
Python Dictionaries: A Complete Guide

Python Dictionaries: A Complete Guide

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6 min read
Python Lists: A Complete Guide

Python Lists: A Complete Guide

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5 min read
Python Sets: A Complete Guide

Python Sets: A Complete Guide

5
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5 min read
Python Tuples: A Complete Guide

Python Tuples: A Complete Guide

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3 min read
How to get all keys in Redis

How to get all keys in Redis

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1 min read
A Complete Guide to Redis Hashes

A Complete Guide to Redis Hashes

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3 min read
A Complete Guide to Javascript Maps

A Complete Guide to Javascript Maps

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6 min read
Deleting an Item in an Array at a Specific Index

Deleting an Item in an Array at a Specific Index

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2 min read
Everything you need to know about Javascript Arrays

Everything you need to know about Javascript Arrays

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3 min read
Inserting an Item into an Array at a Specific Index in Javascript

Inserting an Item into an Array at a Specific Index in Javascript

7
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2 min read
How to Kill a Process Running on a Port

How to Kill a Process Running on a Port

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2 min read
How to delete all keys and everything in Redis

How to delete all keys and everything in Redis

14
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1 min read
Git Stash - Everything about stashing changes in git

Git Stash - Everything about stashing changes in git

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Comments 1
4 min read
Navigation between views in Vue with Vue Router

Navigation between views in Vue with Vue Router

18
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5 min read
How to undo a git pull

How to undo a git pull

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2 min read
How to make Git ignore file permission (chmod) changes

How to make Git ignore file permission (chmod) changes

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1 min read
What are the three dots (...) or spread operator in Javascript?

What are the three dots (...) or spread operator in Javascript?

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2 min read
Vue Tips: Optimize your Vue Apps with v-once and v-memo

Vue Tips: Optimize your Vue Apps with v-once and v-memo

9
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4 min read
Vue Tips: Dynamic CSS with Vue Reactive Variables

Vue Tips: Dynamic CSS with Vue Reactive Variables

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2 min read
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