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What are the First and Second Level caches in Hibernate?
...cache always Associates with the Session object. Hibernate uses this cache by default. Here, it processes one
transaction after another one, means wont process one transaction many
times. Mainly it reduces the number of SQL queries it needs to
generate within a given transaction. That is inste...
Android studio: why are minSdkVersion and targetSdkVersion specified both in AndroidManifest.xml and
... package name, version code, version name, target SDK and many other. Then by one click in Android Studio you can change many properties and generate another apk.
You can leave the manifest as it is and do all configuration in build.gradle. You can safely remove
<uses-sdk></uses-sdk>
...
Why are mutable structs “evil”?
... struct is immutable then all automatic copies resulting from being passed by value will be the same.
If you want to change it you have to consciously do it by creating a new instance of the struct with the modified data. (not a copy)
...
Convert a binary NodeJS Buffer to JavaScript ArrayBuffer
...ayBuffer to Buffer:
function toBuffer(ab) {
var buf = Buffer.alloc(ab.byteLength);
var view = new Uint8Array(ab);
for (var i = 0; i < buf.length; ++i) {
buf[i] = view[i];
}
return buf;
}
shar...
Bubble Sort Homework
...t[i]
bubble(my_list)
print my_list
(I removed your print statement too, by the way.)
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Entity Framework with NOLOCK
...solation level on your connection after you've created your object context by running this simple command:
this.context.ExecuteStoreCommand("SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;");
http://msdn.microsoft.com/en-us/library/aa259216(v=sql.80).aspx
With this technique, we were able to c...
Linq to Entities join vs groupjoin
...th child groups. This can be turned into a flat list of parent-child pairs by two small additions:
from p in parents
join c in children on p.Id equals c.Id into g // <= into
from c in g.DefaultIfEmpty() // <= flattens the groups
select new { Parent = p.Value, Child = c?.ChildValu...
What does “dereferencing” a pointer mean?
...ointer containing a numeric memory address, with 1 referring to the second byte in the process's memory, 2 the third, 3 the fourth and so on....
What happened to 0 and the first byte? Well, we'll get to that later - see null pointers below.
For a more accurate definition of what pointers store, a...
Posting a File and Associated Data to a RESTful WebService preferably as JSON
...ices:
Base64 encode the file, at the expense of increasing the data size by around 33%, and add processing overhead in both the server and the client for encoding/decoding.
Send the file first in a multipart/form-data POST, and return an ID to the client. The client then sends the metadata with th...
Using column alias in WHERE clause of MySQL query produces an error
...
You can only use column aliases in GROUP BY, ORDER BY, or HAVING clauses.
Standard SQL doesn't allow you to
refer to a column alias in a WHERE
clause. This restriction is imposed
because when the WHERE code is
executed, the column value may not yet
be ...