DataTable-针对“每一行”的行

Question

can anybody explain me why the following code works properly

aDataTable.find('tbody').find('tr').each(function() {
    var rowItems = $(this).children();
});

while the following

var rowItems = aDataTable.find('tbody').find('tr')[0].children();

reports the error:

"aDataTable.find(...).find(...)[0].children is not a function"

Answer 1

$(this) is a jQuery object

aDataTable.find('tbody').find('tr')[0] return an Element

like if you were doing this.children() in the first function

you can use the function eq() to get a jQuery object

aDataTable.find('tbody').find('tr').eq(0).children()