In this Article we will go through how to check if a string is an octal number 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
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Let's define this short function:
const isOctal = str => /^(0o)?[0-7]+$/i.test(str);
In this Article we will go through how to check if a string is lower case only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
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Let's define this short function:
const isLowerCase = str => str === str.toLowerCase();
In this Article we will go through how to check if a string is upper case only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
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Let's define this short function:
const isUpperCase = str => str === str.toUpperCase();
In this Article we will go through how to check if a value is a business identifier code only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
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Let's define this short function:
const isBIC = value => /^[a-zA-Z]{6}[a-zA-Z0-9]{2}([a-zA-Z0-9]{3})?$/.test(value);
In this Article we will go through how to check if a value is a number 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
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Let's define this short function:
const isNumber = value => !isNaN(parseFloat(value)) && isFinite(value);
In this Article we will go through how to check if a string contains only digits 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
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Let's define this short function:
const isNumeric = str => !/[^0-9]/.test(str);
In this Article we will go through how to check if a string contains only letters and numbers 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
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Let's define this short function:
const isAlphanumeric = str => /^[0-9A-Z]+$/i.test(str);
In this Article we will go through how to check if a string contains only letters only using single line of code in JavaScript. This is a one-line JavaScript code snippet that uses one of the most popular ES6 features => Arrow Function
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Let's define this short function:
const isAlpha = str => /^[A-Z]+$/i.test(str);
In this Article we will go through how to check if a string contains upper case characters 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
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Let's define this short function:
const containsUpperCase = str => str !== str.toLowerCase();
In this Article we will go through how to check if a string contains whitespace 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
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Let's define this short function:
const containsWhitespace = str => str => /\s/.test(str);