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Count(*) vs Count(1) - SQL Server
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First, there is no semantic difference between select count(1) from table vs. select count(*) from table. They return the same results in all cases (and it is a bug if not). As noted in the other answers, select count(column) from table is semantically different and does not always return the sam...
JPA and Hibernate - Criteria vs. JPQL or HQL
...tion. Criteria queries also completely respect the fetching strategy (join vs select vs subselect).
HQL respects the laziness settings in your mappings and guarantees that what you want loaded is loaded. This means one HQL query might result in several SQL immediate SELECT statements to fetch the ...
[] and {} vs list() and dict(), which is better?
...CTION 0
6 RETURN_VALUE
Same applies to the list vs []
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How to colorize diff on the command line?
...1m-/;s/^+/\x1b[42m+/;s/^@/\x1b[34m@/;s/$/\x1b[0m/'
Throw that in a shell script and pipe unified diff output through it.
It makes hunk markers blue and highlights new/old filenames and added/removed lines in green and red background, respectively.1 And it will make trailing space2 changes more r...
How to run a program without an operating system?
...he case for regular userland executables.
To better understand the linker script part, familiarize yourself with the relocation step of linking: What do linkers do?
Cooler x86 bare metal programs
Here are a few more complex bare metal setups that I've achieved:
multicore: What does multicore assem...
Which Java Collection should I use?
...ge from the oracle documentation which describes each Collection.
HashSet vs TreeSet
There is a detailed discussion of when to use HashSet or TreeSet here:
Hashset vs Treeset
ArrayList vs LinkedList
Detailed discussion: When to use LinkedList over ArrayList?
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Unable to load DLL 'SQLite.Interop.dll'
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How can you add a dependency like that? never done it (VS2013)
– jpgrassi
Sep 2 '15 at 18:15
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Setting design time DataContext on a Window is giving a compiler error?
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Wow, what a pain! Let's hope MS puts in some VS design-time support for x:Bind.
We to be able to use the VS designer but also be able to switch easily to x:Bind instead of Binding. Here's what I did:
In my View, I added a property to get my ViewModel. This makes se...
How can I change IIS Express port for a site
...cation projects, this file is in the solution folder under [Solution Dir]\.vs\config\applicationhost.config (note the .vs folder is a hidden item)
Open the ApplicationHost.config file in a text editor. In the <sites> section, search for your site's name. In the <bindings> section of your...
IISExpress returns a 503 error from remote machines
...rofile%\Documents\IISExpress\config\applicationhost.config
$(solutionDir)\.vs\config\applicationhost.config (VS2015)
Failing that, inspect the output from iisexpress.exe to be sure.
Locate your WebSite entry and add following binding with your machine name.
<binding protocol="http" binding...