In this Article we will go through how to check if an array contains a value matching some criterias 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 contains = (arr, criteria) => arr.some(v => criteria(v));

In this Article we will go through how to check if a value is a plain object 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 isPlainObject = v => (!!v && typeof v === 'object' && (v.__proto__ === null || v.__proto__ === Object.prototype));

In this Article we will go through how to check if a value is a regular expression 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 isRegExp = value => Object.prototype.toString.call(value) === '[object RegExp]';

In this Article we will go through how to check if a value is a string 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 isString = value => Object.prototype.toString.call(value) === '[object String]';

In this Article we will go through how to check if a value is an object 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 isObject = v => (v !== null && typeof v === 'object');

In this Article we will go through how to check if a value is base32 encoded 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 isBase32 = value => value.length % 8 === 0 && /^[A-Z2-7]+=*$/.test(value);

In this Article we will go through how to check if a value is base58 encoded 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:

// It doesn't accept the I, O, l characters 
const isBase58 = value => /^[A-HJ-NP-Za-km-z1-9]*$/.test(value);

In this Article we will go through how to check if a value is base64 encoded 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 isBase64 = value => /^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$/.test(value);

In this Article we will go through how to check if a string is lower case 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 isLowerCase = str => str === str.toLowerCase();

In this Article we will go through how to check if a string is upper case 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 isUpperCase = str => str === str.toUpperCase();