JavaScript-program til sammenligning af elementer i to arrays

I dette eksempel lærer du at skrive et JavaScript-program, der sammenligner elementerne i to arrays.

For at forstå dette eksempel skal du have kendskab til følgende JavaScript-programmeringsemner:

• JavaScript til loop
• JavaScript Array
• JavaScript-funktion og funktionsudtryk

Eksempel 1: Sammenlign arrays ved hjælp af 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);

Produktion

 Arrays har de samme elementer.

Den JSON.stringify()metode konverterer et array i JSON-streng.

 JSON.stringify((1, 3, 5, 8)); // "(1,3,5,8)"

Derefter sammenlignes de to matrixstrenge ved hjælp af ==.

Eksempel 2: Sammenlign arrays ved hjælp af Loop

 // 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,

• The for loop 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, false is returned and the loop terminates.
• If all elements are equal, true is returned.

 array1 = (1, (a : 2), 3, 5);