JavaScript-program for å sammenligne elementer i to matriser

I dette eksemplet lærer du å skrive et JavaScript-program som vil sammenligne elementene i to matriser.

For å forstå dette eksemplet, bør du ha kunnskap om følgende JavaScript-programmeringsemner:

  • JavaScript for loop
  • JavaScript Array
  • JavaScript-funksjon og funksjonsuttrykk

Eksempel 1: Sammenlign matriser ved hjelp av 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);

Produksjon

 Arrangementene har de samme elementene.

Den JSON.stringify()fremgangsmåte omdanner en matrise inn i JSON- streng.

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

Deretter sammenlignes de to arraystrengene ved hjelp av ==.

Eksempel 2: Sammenlign matriser med 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.

Note: The above program does not work if the array element contains objects.

For example,

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

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