Šajā piemērā jūs iemācīsities rakstīt JavaScript programmu, kas salīdzinās divu masīvu elementus.
Lai saprastu šo piemēru, jums jāpārzina šādas JavaScript programmēšanas tēmas:
- JavaScript ciklam
- JavaScript masīvs
- JavaScript funkciju un funkciju izteiksmes
1. piemērs: masīvu salīdzināšana, izmantojot JSON.stringify ()
// program to compare two arrays function compareArrays(arr1, arr2) ( // compare arrays const result = JSON.stringify(arr1) == JSON.stringify(arr2) // if result is true if(result) ( console.log('The arrays have the same elements.'); ) else ( console.log('The arrays have different elements.'); ) ) const array1 = (1, 3, 5, 8); const array2 = (1, 3, 5, 8); compareArrays(array1, array2);
Rezultāts
Masīviem ir vienādi elementi.
JSON.stringify()Metode pārveido masīvu vērā JSON virkni.
JSON.stringify((1, 3, 5, 8)); // "(1,3,5,8)"
Pēc tam abas masīvu virknes tiek salīdzinātas, izmantojot ==.
2. piemērs: salīdziniet masīvus, izmantojot cilnei
// program to extract value as an array from an array of objects function compareArrays(arr1, arr2) ( // check the length if(arr1.length != arr2.length) ( return false; ) else ( let result = false; // comparing each element of array for(let i=0; i
Output
The arrays have the same elements.
In the above program,
The length of the array elements are compared using the length property. If both arrays have different lengths, false is returned.
Else,
Theforloop is used to iterate through all the elements of the first array.During each iteration, elements of the first array are compared to corresponding elements of the second array.arr1(i) != arr2(i)If the corresponding array elements of both arrays are not equal,falseis returned and the loop terminates.If all elements are equal,trueis returned.
Note: The above program does not work if the array element contains objects.
For example,
array1 = (1, (a : 2), 3, 5);








