1591720680
The arrow function deserves the popularity. Its syntax is concise, binds this lexically, fits great as a callback.
In this post, you’ll read 5 best practices to get even more benefits from the arrow functions.
#functional-programming #web-development #coding #programming #javascript
1605017502
Other then the syntactical differences. The main difference is the way the this keyword behaves? In an arrow function, the this keyword remains the same throughout the life-cycle of the function and is always bound to the value of this in the closest non-arrow parent function. Arrow functions can never be constructor functions so they can never be invoked with the new keyword. And they can never have duplicate named parameters like a regular function not using strict mode.
this.name = "Bob";const person = {
name: “Jon”,<span style="color: #008000">// Regular function</span> func1: <span style="color: #0000ff">function</span> () { console.log(<span style="color: #0000ff">this</span>); }, <span style="color: #008000">// Arrow function</span> func2: () => { console.log(<span style="color: #0000ff">this</span>); }
}
person.func1(); // Call the Regular function
// Output: {name:“Jon”, func1:[Function: func1], func2:[Function: func2]}person.func2(); // Call the Arrow function
// Output: {name:“Bob”}
const person = (name) => console.log("Your name is " + name); const bob = new person("Bob"); // Uncaught TypeError: person is not a constructor
#arrow functions #javascript #regular functions #arrow functions vs normal functions #difference between functions and arrow functions
1619518440
Welcome to my Blog , In this article, you are going to learn the top 10 python tips and tricks.
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#python #python hacks tricks #python learning tips #python programming tricks #python tips #python tips and tricks #python tips and tricks advanced #python tips and tricks for beginners #python tips tricks and techniques #python tutorial #tips and tricks in python #tips to learn python #top 30 python tips and tricks for beginners
1598740560
Giving your novel a strong sense of place is vital to doing your part to engage the readers without confusing or frustrating them. Setting is a big part of this (though not the whole enchilada — there is also social context and historic period), and I often find writing students and consulting clients erring on one of two extremes.
**Either: **Every scene is set in a different, elaborately-described place from the last. This leads to confusion (and possibly exhaustion and impatience) for the reader, because they have no sense of what they need to actually pay attention to for later and what’s just…there. Are the details of that forest in chapter 2 important? Will I ever be back in this castle again? Is there a reason for this character to be in this particular room versus the one she was in the last time I saw her? Who knows!
Or: There are few or no clues at all as to where the characters are in a scene. What’s in the room? Are they even in a room? Are there other people in th — ope, yes, there are, someone just materialized, what is happening? This all leads to the dreaded “brains in jars” syndrome. That is, characters are only their thoughts and words, with no grounding in the space-time continuum. No one seems to be in a place, in a body, at a time of day.
Everything aspect of writing a novel comes with its difficulties, and there are a lot of moving pieces to manage and deploy in the right balance. When you’re a newer writer, especially, there’s something to be said for keeping things simple until you have a handle on how to manage the arc and scope of a novel-length work. And whether you tend to overdo settings or underdo them, you can learn something from TV, especially classic sitcoms.
Your basic “live studio audience” sitcoms are performed and filmed on sets built inside studios vs. on location. This helps keep production expenses in check and helps the viewer feel at home — there’s a reliable and familiar container to hold the story of any given episode. The writers on the show don’t have to reinvent the wheel with every script.
Often, a show will have no more than two or three basic sets that are used episode to episode, and then a few other easily-understood sets (characters’ workplaces, restaurants, streets scenes) are also used regularly but not every episode.
#creative-writing #writing-exercise #writing-craft #writing #writing-tips #machine learning
1591720680
The arrow function deserves the popularity. Its syntax is concise, binds this lexically, fits great as a callback.
In this post, you’ll read 5 best practices to get even more benefits from the arrow functions.
#functional-programming #web-development #coding #programming #javascript
1598093640
When I was at a coding boot camp learning about JavaScript and ES6, everyone in class seemed to have some level of confusion around normal function declarations and the new ES6 arrow function declarations. Common questions we had included:
After doing some research, I found that normal functions and arrow functions are actually not interchangeable in certain circumstances. Apart from the syntax, normal functions and arrow functions have another major difference: the way they bind the this
keyword in JavaScript.
Let’s look at a very simple example. Suppose we have a simple JavaScript object:
const obj1 = {
fullName: 'Object 1',
color: 'red',
print: function() {
console.log(`${this.fullName} is ${this.color}`);
}
};
obj1.print(); // Object 1 is red
view raw
object1.js hosted with ❤ by GitHub
We have a print
method on obj1
that logs a string to the console. The result is what we have expected, that this
in the print
method refers to obj1
itself.
Now let’s create another object with a slightly different print
method:
const obj2 = {
fullName: 'Object 2',
color: 'blue',
print: function() {
setTimeout(function() {
console.log(`${this.fullName} is ${this.color}`);
}, 1000);
}
};
obj2.print(); // undefined is undefined
view raw
object2.js hosted with ❤ by GitHub
Now the print
method will only log the resulting string after one second due to setTimeout
. But why is it logging undefined is undefined
instead of Object 2 is blue
?
#es2015 #javascript #es6 #javascript-tips #arrow-functions #function