What is the process for obtaining the hash value of an object in typescript?
For instance:
let user:any = {name:'tempuser', age:'29'};
let anotheruser:any = {name:'iam', age:'29'};
if( Object.GetHashCode(user) === Object.GetHashCode(anotheruser)){
alert('equal');
}
Furthermore, it allows us to determine if the object has been modified or not.
As far as my knowledge goes, both JavaScript and TypeScript do not come equipped with a built-in generic hashing function.
To get around this limitation, one option is to make use of an external library such as ts-md5. With this library, you can hash a string representation of your object by using the code snippet:
Md5.hashStr(JSON.stringify(yourObject))It's vital to note that the suitability of this approach varies depending on your specific requirements. It may work perfectly in some cases, while in others it could be too slow or lead to numerous conflicts.
When it comes to comparing objects, the @Valery solution focuses on comparing data while overlooking the objects themselves. If your goal is to compare the actual objects rather than just their data, this approach may not be suitable for you.
On the other hand, if you are primarily interested in comparing the data within these objects, a simple comparison using JSON.stringify(obj1) === JSON.stringify(obj2) will suffice. This method essentially treats the objects as strings and compares them accordingly.
When looking to implement a hash table for applications unrelated to cryptocurrency, one can refer to the below TypeScript code snippet which mirrors the classic Java hashCode function for strings:
export function hashCode(str: string): number {
var h: number = 0;
for (var i = 0; i < str.length; i++) {
h = 31 * h + str.charCodeAt(i);
}
return h & 0xFFFFFFFF
}
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