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Does MongoDB's $in clause guarantee order
...y have two options.
So let's say that you were matching on the values of _id in your documents with an array that is going to be passed in to the $in as [ 4, 2, 8 ].
Approach using Aggregate
var list = [ 4, 2, 8 ];
db.collection.aggregate([
// Match the selected documents by "_id"
{...
get an element's id
Is there another way to get an DOM element's ID?
8 Answers
8
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Can multiple different HTML elements have the same ID if they're different elements?
Can multiple HTML elements have the same ID if they're of different element types? Is a scenario like this valid? Eg:
16 An...
How to specify id when uses include in layout xml file
...ml file, I have included other layout xml file (each
with a different android id).
11 Answers
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MySQL INNER JOIN select only one row from second table
...
You need to have a subquery to get their latest date per user ID.
SELECT a.*, c.*
FROM users a
INNER JOIN payments c
ON a.id = c.user_ID
INNER JOIN
(
SELECT user_ID, MAX(date) maxDate
FROM payments
GROUP BY user_ID
) b ON c.user_ID = b....
jQuery Selector: Id Ends With?
Is there a selector that I can query for elements with an ID that ends with a given string?
9 Answers
...
Select first row in each GROUP BY group?
... Firebird 3.0+, Teradata, Sybase, Vertica:
WITH summary AS (
SELECT p.id,
p.customer,
p.total,
ROW_NUMBER() OVER(PARTITION BY p.customer
ORDER BY p.total DESC) AS rk
FROM PURCHASES p)
SELECT s.*
FROM summary s
WHERE ...
Oracle “(+)” Operator
...89 format (using a comma in the FROM clause to separate table references) didn't standardize OUTER joins.
The query would be re-written in ANSI-92 syntax as:
SELECT ...
FROM a
LEFT JOIN b ON b.id = a.id
This link is pretty good at explaining the difference between JOINs.
It should als...
In an array of objects, fastest way to find the index of an object whose attributes match a search
...ch by 'field' attribute:
var elementPos = array.map(function(x) {return x.id; }).indexOf(idYourAreLookingFor);
var objectFound = array[elementPos];
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JavaScript - onClick to get the ID of the clicked button
How do find the id of the button which is being clicked?
16 Answers
16
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