Ram Maheshwari ♾️Take your JavaScript skills to the next level with these essential one-liners that will also save you hours of coding 🚀
1) Find the max value in an array:
Math.max(...array)
2) Remove duplicates from an array:
[...new Set(array)]
3) Generate a random number between 1 and 100:
Math.floor(Math.random() * 100) + 1
4) Check if a string is a valid number:
!isNaN(parseFloat(string))
5) Get the current date and time:
new Date().toString()
6) Check if a variable is an array:
Array.isArray(variable)
7) Check if a variable is an object:
typeof variable === "object"
8) Convert an array to a string:
array.join(",")
9) Check if a variable is a function:
typeof variable === "function"
10) Convert an object to an array:
Object.values(object)
11) Count the occurrences of an element in an array:
array.filter(x => x === element).length
12) Create a new object with a dynamic key and value:
{ [key]: value }
13) Check if a string is a palindrome:
string === string.split("").reverse().join("")
14) Get the the sum of all the numbers in an array
array.reduce((a, b) => a + b, 0));
15) Get the current timestamp:
Date.now()
16) Check if a variable is null:
variable === null
17) Check if a variable is undefined:
typeof variable === "undefined"
18) Find the minimum value in an array
Math.min(...array)
19) Check if an array is empty:
array.length === 0
20) Create a new array with a specified range of numbers:
Array.from({ length: n }, (_, i) => i)
Hope this is helpful ✨
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