如何将键分配给JavaScript数组中的现有值

Question

I recovered an array with values from a previous method and I need to go through it and assign each of the values a key in alphabetical order.

["T", "C", "α", "T(linked)", "C"]

This is my array, previously mentioned. I want to know how, when crossing the array will I be able to assign it a key of alphabetical form, so that the final result was:

["A:T", "B:C", "C:α", "D:T(linked), "E:C"]

Any advice will be welcome. Thank you in advance.

Answer 1

By having single elements, you could just map the values with a prefix.

 var data = ["T", "C", "α", "T(linked)", "C"], result = data.map((v, i) => `${(i + 10).toString(36).toUpperCase()}:${v}`); console.log(result); 

Answer 2

You can achieve it by using Array.prototype.map function.

 let a = ["T", "C", "α", "T(linked)", "C"]; a = a.map((val,index)=>{ return `${String.fromCharCode(65 + index )}:${val}`; } ) ; console.log(a); 

Answer 3

In your input array:

["T, C", "α", "T(linked), C"]

are "T, C" and "T(linked), C" supposed to be elements as is, or are you missing quotation marks? In other words, did you mean this?

["T", "C", "α", "T(linked)", "C"]

You can use the map function. Using the code

newArray = array.map((value, index) => ...)

will generate a new array with a function done for each value and index of the old array.

array = ["T", "C", "α", "T(linked)", "C"];
newArray = array.map((value, index) => `${String.fromCharCode(index + 65)}:${value}`);

newArray will be set to

["A:T", "B:C", "C:α", "D:T(linked)", "E:C"]

If you don't understand that method of concatenating strings, use this instead.

array = ["T", "C", "α", "T(linked)", "C"];
newArray = array.map((value, index) => String.fromCharCode(index + 65) + ":" + value);