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What is the difference between URI, URL and URN? [duplicate]
...rce either by location, or a name, or both. A URI has two specializations known as URL and URN.
A Uniform Resource Locator (URL) is a subset of the Uniform Resource Identifier (URI) that specifies where an identified resource is available and the mechanism for retrieving it. A URL defines how the r...
Why does Java have transient fields?
...eyword, one has to understand the concept of serialization. If the reader knows about serialization, please skip the first point.
What is serialization?
Serialization is the process of making the object's state persistent. That means the state of the object is converted into a stream of bytes to b...
How can Xcode 6 adaptive UIs be backwards-compatible with iOS 7 and iOS 6?
...lasses that have a Compact Height. This has been confirmed by Apple and is now stated directly in the documentation:
For apps supporting versions of iOS earlier than iOS 8, most size classes are backward compatible.
Size classes are backward compatible when:
- The app is built using Xcode version 6...
What is sharding and why is it important?
... advantage would be that search load for the
large partitioned table can now be split across multiple servers
(logical or physical), not just multiple indexes on the same logical
server.
Also,
Splitting shards across multiple isolated instances requires more than
simple horizontal part...
Fluent and Query Expression — Is there any benefit(s) of one over other?
...lit()
orderby fullName, name
select name + " came from " + fullName;
Now compare this to the same thing in method syntax:
var query = fullNames
.SelectMany (fName => fName.Split().Select (name => new { name, fName } ))
.OrderBy (x => x.fName)
.ThenBy (x => x.name)
.Select...
Convert two lists into a dictionary
...onstructor with zip
new_dict = dict(zip(keys, values))
In Python 3, zip now returns a lazy iterator, and this is now the most performant approach.
dict(zip(keys, values)) does require the one-time global lookup each for dict and zip, but it doesn't form any unnecessary intermediate data-structur...
How to set my default shell on Mac?
...
This is answered in the docs now.
– reergymerej
Sep 27 '18 at 13:23
...
Why can't a text column have a default value in MySQL?
...cal to me (and somewhat frustrating, as I want a default value!). Anybody know why this is not allowed?
7 Answers
...
How can I check if a program exists from a Bash script?
...y matter anymore and both type and hash become perfectly safe to use. type now has a -P to search just the PATH and hash has the side-effect that the command's location will be hashed (for faster lookup next time you use it), which is usually a good thing since you probably check for its existence i...
Identity increment is jumping in SQL Server database
...this behaviour due to a performance improvement since SQL Server 2012.
It now by default uses a cache size of 1,000 when allocating IDENTITY values for an int column and restarting the service can "lose" unused values (The cache size is 10,000 for bigint/numeric).
This is mentioned in the documen...