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Solving a “communications link failure” with JDBC and MySQL [duplicate]
... TOMCAT6_SECURITY=no
use validationQuery property
use validationQuery="select now()" to make sure each query has responses
AutoReconnect
Add this code to your connection string:
&autoReconnect=true&failOverReadOnly=false&maxReconnects=10
Although non of these solutions worke...
What is Scala's yield?
...in F# would be
[ for a in args -> a.toUpperCase ]
or
from a in args select a.toUpperCase
in Linq.
Ruby's yield has a different effect.
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Get generated id after insert
...d= db.getSQLiteDatabase().insert("user", "", values) ;
If query exec use select last_insert_rowid()
String sql = "INSERT INTO [user](firstName,lastName) VALUES (\"Ahmad\",\"Aghazadeh\"); select last_insert_rowid()";
DBHelper itemType =new DBHelper();// your dbHelper
c = db.rawQuery(sql, null);
...
Why does this async action hang?
...DBConnection.ExecuteAsync<ResultClass>(
ds => ds.Execute("select slow running data into result"));
}
What's the difference? There's now no awaiting anywhere, so nothing being implicitly scheduled to the UI thread. For simple methods like these that have a single return, there's no...
Increasing (or decreasing) the memory available to R processes
...program
icon (the icon on your desktop or in
your programs directory). Select
``Properties'', and then select the
``Shortcut'' tab. Look for the
``Target'' field and after the closing
quotes around the location of the R
executible, add
--max-mem-size=500M
as shown in the fig...
Disabling Chrome cache for website development
...ck (or hold left click) on the reload button at the top of the browser and select "Empty Cache and Hard Reload."
This will go beyond "Hard Reload" to empty the cache entirely, ensuring that anything downloaded via javascript or etc. will also avoid using the cache. You don't have to mess with set...
Maven Install on Mac OS X
...t:~$ sudo port install maven3 will Install Maven 3.0
you@host:~$ sudo port select --set maven maven3 selects that version of Maven
Installing by hand:
Download Maven from its homepage
Follow the installation instructions:
Extract the distribution archive, i.e.apache-maven-3.3.9-bin.tar.gz to th...
jquery if div id has children
...
If you add a selector to children, you can also check if an element has children that match a particular selector, like if you want to see if an element has a child of a particular class.
– Muhd
May ...
How to tell Eclipse Workspace?
...
If any project exists in the workspace:
Select a project and its properties (e.g. Menu: Project -> Properties or right mouse button->Properties). Then go to Resource -> Linked Resources and the WORKSPACE_LOC's Path Variable value shows the current workspa...
JQuery: 'Uncaught TypeError: Illegal invocation' at ajax request - several elements
I have two select elements, A and B: when A's selected option changes, B's options must be updated accordingly. Each element in A implies many elements in B, it's a one-to-many relationship (A contains nations, B should contain cities located in the given nation).
...