sort function in react js
this.state.data.sort((a, b) => a.timeM > b.timeM ? 1:-1).map(
(item, i) => <div key={i}> {item.matchID} {item.timeM} {item.description}</div>
)
sort function in react js
this.state.data.sort((a, b) => a.timeM > b.timeM ? 1:-1).map(
(item, i) => <div key={i}> {item.matchID} {item.timeM} {item.description}</div>
)
array sort js
arr = ['width', 'score', done', 'neither' ]
arr.sort() // results to ["done", "neither", "score", "width"]
arr.sort((a,b) => a.localeCompare(b))
// if a-b (based on their unicode values) produces a negative value,
// a comes before b, the reverse if positive, and as is if zero
//When you sort an array with .sort(), it assumes that you are sorting strings
//. When sorting numbers, the default behavior will not sort them properly.
arr = [21, 7, 5.6, 102, 79]
arr.sort((a, b) => a - b) // results to [5.6, 7, 21, 79, 102]
// b - a will give you the reverse order of the sorted items
//this explnation in not mine
how the sort function works javascript
const unsorted = ['d', 'd', 'h', 'r', 'v', 'z', 'f', 'c', 'g'];
const sorted = unsorted.sort();
console.log(sorted);
//["c", "d", "d", "f", "g", "h", "r", "v", "z"]
const unsortedNums = [45, 56, 3, 3, 4, 6, 7, 45, 1];
const sortedNums = unsortedNums.sort((a, b) => {
return a - b;
});
console.log(sortedNums);
//[1, 3, 3, 4, 6, 7, 45, 45, 56]
arr.sort
//sort an array of strings
var fruitSalad = ['cherries', 'apples', 'bananas'];
fruit.sort(); // ['apples', 'bananas', 'cherries']
//sort an array of numbers
var scores = [1, 10, 2, 21];
scores.sort(); // [1, 10, 2, 21]
// Watch out that 10 comes before 2,
// because '10' comes before '2' in Unicode code point order.
//sorts an array of words
var randomThings = ['word', 'Word', '1 Word', '2 Words'];
randomThings.sort(); // ['1 Word', '2 Words', 'Word', 'word']
// In Unicode, numbers come before upper case letters,
// which come before lower case letters.
how to sort an array in javascript
you can sort array in different ways:
first....by using the sort method
ex: let arr = ["a", "d", "b", "c", "f"]
let res = arr.sort()
NOTE: this method is not ideal
second...... by using the sort function
ex: let arr = [1, 10, 11, 30, 100, 50, 45]
let res = arr.sort((a, b)=> a - b ).....this sorts in ascending order
let res = arr.sort((a, b)=> b - a ) ...this sorts in descending order
NOTE: we can also user different algorithms to sort an array. example: bubble sort,
quick sort, merge sort etc.
answer by EZIOGOR CLEVER
sorting array
def merge_sort(array, left_index, right_index):
if left_index >= right_index:
return
middle = (left_index + right_index)//2
merge_sort(array, left_index, middle)
merge_sort(array, middle + 1, right_index)
merge(array, left_index, right_index, middle)
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