In this Article we will go through how to execute a function once only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
.
Let's define this short function:
const once = fn => ((ran = false) => () => ran ? fn : (ran = !ran, fn = fn()))();
In this Article we will go through how to flip the arguments of a function only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
.
Let's define this short function:
// Reverse the order of arguments
const flip = fn => (...args) => fn(...args.reverse());
// For binary functions
const flip = fn => (b, a) => fn(a, b);
In this Article we will go through how to identity function only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
.
Let's define this short function:
const identity = x => x;
In this Article we will go through how to logical xor operator only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
.
Let's define this short function:
// returns `true` if one of the arguments is truthy and the other is falsy
const xor = (a, b) => (a && !b) || (!a && b);
In this Article we will go through how to memoize a function only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
.
Let's define this short function:
const memoize = fn => ((cache = {}) => arg => cache[arg] || (cache[arg] = fn(arg)))();
In this Article we will go through how to compose functions only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
.
Let's define this short function:
// Compose functions from right to left
const compose = (...fns) => x => fns.reduceRight((y, f) => f(y), x);
In this Article we will go through how to create a function that accepts a single argument only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
.
Let's define this short function:
const unary = fn => arg => fn(arg);
In this Article we will go through how to create an empty function only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
.
Let's define this short function:
const noop = () => {};
In this Article we will go through how to check if a value is a function only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
.
Let's define this short function:
const isFunction = v => ['[object Function]', '[object GeneratorFunction]', '[object AsyncFunction]', '[object Promise]'].includes(Object.prototype.toString.call(v));
In this Article we will go through how to check if a value is a generator function only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
.
Let's define this short function:
const isGeneratorFunction = v => Object.prototype.toString.call(v) === '[object GeneratorFunction]';