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Still Reachable Leak detected by Valgrind
... reachable" memory can be considered a memory leak: assume you have a hash table where you add pointers to heap allocated memory as value. If you keep inserting new entries on the table, but won't remove and free those you don't need anymore, it can grow indefinitely, leaking heap memory event if th...
Sqlite LIMIT / OFFSET query
... necessarily mean it's in the order you want. The only way to get a predictable order is to use ORDER BY explicitly.
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SQL Server CTE and recursion example
...your question?
--------------------------------------------
-- Synthesise table with non-recursive CTE
--------------------------------------------
;WITH Employee (ID, Name, MgrID) AS
(
SELECT 1, 'Keith', NULL UNION ALL
SELECT 2, 'Josh', 1 UNION ALL
SELECT 3...
Create a custom View by inflating a layout?
...u are using a bit of xml repeatedly. Suppose, for example, that you have a table that you wish to create a table row for each entry in a list. You've set up some xml:
In my_table_row.xml:
<?xml version="1.0" encoding="utf-8"?>
<TableRow xmlns:android="http://schemas.android.com/apk/res/an...
How do BitTorrent magnet links work?
... this using a separate peer-to-peer network2 operating a "distributed hash table" (DHT). A DHT is a big distributed index which maps torrents (identified by infohashes) to lists of peers (identified by IP address and ports) who are participating in a swarm for that torrent (uploading/downloading dat...
MySQL ON DUPLICATE KEY UPDATE for multiple rows insert in single query
...r.
for SQL server, the way to work around this is to first declare a temp table, insert value to that temp table, and then use MERGE
Like this:
declare @Source table
(
name varchar(30),
age decimal(23,0)
)
insert into @Source VALUES
('Helen', 24),
('Katrina', 21),
('Samia', 22),
('Hui Ling', 25)...
How to draw a circle with text in the middle?
...can make border-radius:50%; that makes your code event more elegant and portable, without having to change this attribute each time based on the width and height ;)
– bonCodigo
Aug 14 '14 at 10:37
...
Adding a favicon to a static HTML page
...
Usage Syntax: .ico, .gif, .png, .svg
This table shows how to use the favicon in major browsers. The standard implementation uses a link element with a rel attribute in the section of the document to specify the file format and file name and location.
Note that most...
Can I return the 'id' field after a LINQ insert?
... I've used this before, but how to make this work on a multirelationship tables? Do I have to save the main tables first get the ID from both and then save both id to the relationship table?
– CyberNinja
Aug 12 '19 at 16:55
...
Is gcc std::unordered_map implementation slow? If so - why?
...red_map, the g++ implementation will automatically rehash to a larger hash table, and this would be a big drag on performance. If I remember correctly, unordered_map defaults to (smallest prime larger than) 100.
I didn't have chrono on my system, so I timed with times().
template <typename TEST...