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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...
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...
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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javascript: Clear all timeouts?
...integer that is greater than zero that will identify the timeout to be set by this call." which leaves room for the handle to be any positive integer including non-consecutive and non-small integers.
– Mike Samuel
Jan 14 '12 at 4:59
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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...
.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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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
...
Join/Where with LINQ and Lambda
...load all of its records associated with it via the foreign key represented by the 'Post_metas' property":
var dataLoadOptions = new DataLoadOptions();
dataLoadOptions.LoadWith<Post>(p => p.Post_metas);
var dataContext = new MyDataContext();
dataContext.LoadOptions = dataLoadOptions;
var ...
Can I bind an array to an IN() condition?
...redundant, so the foreach loop and the $stmt->execute could be replaced by just ...
<?php
(...)
$stmt->execute($ids);
?>
(again, i didn't test it)
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