Javascript：如何切片对象数组？

Question

So, I have an array of objects like this:

    for(var i=0; i<travelcard_table.length;i++){
        var table_row = travelcard_table.eq(i);
        var ii = 0;
        passenger_info[i] = {};
        table_row.find("td").each(function() {
                passenger_info[i][table_keys[ii]] = $(this).text();
                ii++;
        });
    }

passenger_info[0]['First name'] = "John"; etc..
passenger_info[1]['First name'] = "Chuck"; etc..

Im trying to split this to smaller arrays of objects every 10 entries, so Its something like this:

var size = 10;
for (var i=0; i<passenger_count; i+=size) {
    var smallarray = passenger_info.slice(i,i+size); << "Error: Slice is not a function"
    console.log(smallarray);
    // do something with smallarray
}

How to achieve this?

Answer 1

var passenger_info = [[], []];

passenger_info[0]['First name'] = "John";
passenger_info[1]['First name'] = "Chuck"; 
var sliced = passenger_info.slice(0,1);
alert(sliced[0]['First name']);

This alerts 'John', because passenger_info is an Array of Array objects and you are attaching properties to the array object and not to its items.

for an array of objects it should be:

var passenger_info = [ {} , {}];

passenger_info[0].firstname = "John";
passenger_info[1].firstname = "Chuck"; 
var sliced = passenger_info.slice(0,1);
alert(sliced[0].firstname);

Answer 2

like this you can workout

for (var i=0; i<passenger_info.length; i+=10) {  
var smallArray = [];
    for(var j=0;j<10 && i+j < passenger_info.length;j++) {
        smallArray.push(passenger_info[i+j]);
    }
    console.log(smallArray);
}

for using slice you can do like this

for (var i=0; i<passenger_info.length; i+=10) {  
    var smallArray = [],ls;
        for(var j=0;j<10 && i+j < passenger_info.length;j++) {
            ls = i+j;
        }
        smallArray  = passenger_info.slice(i,ls+1); 
console.log(smallArray);
    }