Javascript-Array.prototype.find是否可以使用参数来搜索

Question

I am looking at the documentation here but can not find what I am looking for.

What I would like to achieve is something like this:

 var valueToSearchFor = "something"

 function SearchArray(currentIndex, valueToSearchFor){
    return currentIndex.PropertyName === valueToSearchFor;
 }

 var attribute = myArray.find(SearchArray(valueToSearchFor));

rather than:

 var valueToSearchFor = "something"

 function SearchArray(currentIndex){
    return currentIndex.PropertyName === valueToSearchFor;
 }

 var attribute = myArray.find(SearchArray);

In my case the valueToSearchFor is not thread safe. Am I missing something?

Answer 1

I'm not sure what you mean by:

in my case the valueToSearchFor is not thread safe

But regardless, you can still achieve this kind of functionality with currying:

var valueToSearchFor = "something";

function createSearchArray (valueToSearchFor) {
  return function (currentIndex) {
    return currentIndex.PropertyName === valueToSearchFor;
  }
}

var attribute = myArray.find(createSearchArray(valueToSearchFor));

The idea here is to create the function you're looking for using your valueToSearchFor variable. We then return this function to .find() .