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to drawRect or not to drawRect (when should one use drawRect/Core Graphics vs subviews/images and wh
...bviews whenever you can. You can be more productive, and take advantage of all the OO mechanisms that should things easier to maintain. Use Core Graphics when you can't get the performance you need out of UIKit, or you know trying to hack together drawing effects in UIKit would be more complicated....
All combinations of a list of lists
I'm basically looking for a python version of Combination of List<List<int>>
7 Answers
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How do I (or can I) SELECT DISTINCT on multiple columns?
I need to retrieve all rows from a table where 2 columns combined are all different. So I want all the sales that do not have any other sales that happened on the same day for the same price. The sales that are unique based on day and price will get updated to an active status.
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Differences between MySQL and SQL Server [closed]
I'm an ASP.NET developer who has used Microsoft SQL Server for all my database needs (both at work and for personal projects).
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How do I run Redis on Windows?
...an use to interact with any Redis instance.
The RGL repository has historically been listed as an alternative Windows port for Redis, but this repository has not been maintained for some time and implements an older version of Redis than the Microsoft port.
It should be noted that the official port ...
Linux vi arrow keys broken in insert mode
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@pts - only on broken systems. Starting vim as vi on all of my boxes works just fine; however, there are some CentOS boxes I have used that demonstrate the behavior you are talking about.
– Chas. Owens
May 1 '09 at 22:22
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Downloading MySQL dump from command line
..., then:
$ mysqldump -u [uname] -p db_name > db_backup.sql
If it's all DBs, then:
$ mysqldump -u [uname] -p --all-databases > all_db_backup.sql
If it's specific tables within a DB, then:
$ mysqldump -u [uname] -p db_name table1 table2 > table_backup.sql
You can even go as f...
Can you have if-then-else logic in SQL? [duplicate]
...SE statement is the closest to an IF statement in SQL, and is supported on all versions of SQL Server:
SELECT CASE <variable>
WHEN <value> THEN <returnvalue>
WHEN <othervalue> THEN <returnthis>
ELSE <returndefaultcase>
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How to append data to div using JavaScript?
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theDiv.appendChild(content);
Using innerHTML:
This approach will remove all the listeners to the existing elements as mentioned by @BiAiB. So use caution if you are planning to use this version.
var theDiv = document.getElementById("<ID_OF_THE_DIV>");
theDiv.innerHTML += "<YOUR_CONTENT&...
What is the difference between trie and radix trie data structures?
...ed only five nodes. In the picture above nodes are the asterisks.
So, overall, a radix tree takes less memory, but it is harder to implement. Otherwise the use case of both is pretty much the same.
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