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Angular ng-repeat Error “Duplicates in a repeater are not allowed.”
... working again.
// This will work
<div ng-repeat="row in [1,1,1] track by $index">
Official docs are here: https://docs.angularjs.org/error/ngRepeat/dupes
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Create a custom View by inflating a layout?
...
Here is a simple demo to create customview (compoundview) by inflating from xml
attrs.xml
<resources>
<declare-styleable name="CustomView">
<attr format="string" name="text"/>
<attr format="reference" name="image"/>
</declare-sty...
SQL Joins Vs SQL Subqueries (Performance)?
...or, since SQL normally evaluates it as a series of WHERE clauses separated by "OR" (WHERE x=Y OR x=Z OR...).
As with ALL THINGS SQL though, your mileage may vary. The speed will depend a lot on indexes (do you have indexes on both ID columns? That will help a lot...) among other things.
The onl...
Does the join order matter in SQL?
...he outer join is associative as long as neither predicate can be satisfied by a row in which all columns from one table are NULL, than to say that it's associative as long as the predicates don't involve IS NULL or 'a function that is related to nulls'. One can easily imagine a predicate that satisf...
Select row with most recent date per user
... WHERE t2.user = t1.user
ORDER BY t2.id DESC
LIMIT 1)
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.Contains() on a list of custom class objects
... +1 Good clear example, that shows the option that wouldn't be affected by changes elsewhere (i.e. if the Equals() method got changed for whatever reason)
– Rowland Shaw
Apr 13 '10 at 15:18
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What is “callback hell” and how and why does RX solve it?
...know anything about RX in particular, but usually this problem gets solved by adding native support for asynchronous computation in the programming language. The implementations can vary and include: async, generators, coroutines, and callcc.
In Python we can implement that previous loop example w...
How to change identity column values programmatically?
...h SEQUENCES
CREATE SEQUENCE Seq
AS INT
START WITH 1
INCREMENT BY 1
CREATE TABLE Test2
(
ID INT DEFAULT NEXT VALUE FOR Seq NOT NULL PRIMARY KEY,
X VARCHAR(10)
)
INSERT INTO Test2(X)
SELECT 'Foo' UNION ALL
SELECT 'Bar' UNION ALL
SELECT 'Baz'
UPDATE Test2 SET ID+=1
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How may I reference the script tag that loaded the currently-executing script?
...Does not work with modules <script type="module">
2. Select script by id
Giving the script an id attribute will let you easily select it by id from within using document.getElementById().
<script id="myscript">
var me = document.getElementById('myscript');
</script>
Benefits...
Swift how to sort array of custom objects by property value
...t 2
images.sorted({ $0.fileID > $1.fileID })
Swift 3+
images.sorted(by: { $0.fileID > $1.fileID })
The example above gives desc sort order
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