jQuery-检查值是否存在于关联数组的列中

Question

I want to check if the an id already exist in my array. if It exists the older value should be removed, and the new value should be added to the array, if not it should be added to the array.

Here's the code that I tried but didn't work.

sample_array[0] = {'id' : 1, 'letter': 'a'};
sample_array[1] = {'id' : 2, 'letter': 'b'};
sample_array[2] = {'id' : 3, 'letter': 'c'};
sample_array[3] = {'id' : 4, 'letter': 'd'};
sample_array[4] = {'id' : 5, 'letter': 'e'};

input_id = 3;
count_length = sample_array.length;
input_letter = 'L'; 
idx = $.inArray(input_id, sample_array.id); // <- i think this is where it goes wrong.

if(idx ==  -1)
{
   //add to the array
   sample_array[count_length] = {'id' : input_id, 'letter': input_letter};              
}
else
{
   //remove then add to the array
   sample_array.splice(idx, 1);
   sample_array[count_length] = {'id' : input_id, 'letter': input_letter}; 
}

Answer 1

You are searching for a primitive value not an object, so

replace from this line onwards

idx = $.inArray(input_id, sample_array.id);

with

sample_array.forEach(function(value,index){
   if(value.id==input_id)
   {
     sample_array.splice(index,1);
   }
}).length;
sample_array.push({'id' : input_id, 'letter': input_letter});