Here are some examples of top JavaScript one-liners:
Find the maximum value in an array:
const max = Math.max(...array);
Filter an array to remove duplicates:
const unique = [...new Set(array)]
Convert a string to title case:
const titleCase = str => str.toLowerCase().replace(/(^|\s)\S/g, t => t.toUpperCase());
Check if an array includes a certain value:
const includesValue = array.includes(value);
Reverse a string:
const reversedString = str.split("").reverse().join("");
Get the sum of an array:
const sum = array.reduce((acc, curr) => acc + curr, 0);
Shuffle an array:
const shuffledArray = array.sort(() => Math.random() - 0.5);
Find the average of an array:
const avg = array.reduce((acc, curr) => acc + curr, 0) / array.length;
Check if a value is a number:
const isNumber = value => !isNaN(value);
Get the current date in ISO format:
const currentDate = new Date().toISOString().slice(0, 10);
Check if an array is empty:
const isEmpty = array.length === 0;
Convert a number to a string with commas:
const numberWithCommas = num => num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
Find the smallest value in an array:
const min = Math.min(...array);
Remove a specific value from an array:
const newArray = array.filter(value => value !== toRemove);
Find the index of a specific value in an array:
const index = array.indexOf(value);
Get the last element of an array:
const lastElement = array[array.length - 1];
Sort an array of objects by a specific property:
const sortedArray = array.sort((a, b) => a.property - b.property);
Merge two arrays:
const mergedArray = [...array1, ...array2];
Check if a string contains a specific substring:
const containsSubstring = str.includes(substring);
Reverse the order of words in a string:
const reversedWords = str.split(" ").reverse().join(" ");
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