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raw vs. html_safe vs. h to unescape html
...tml_safe actually "sets the string" as HTML Safe (it's a little more complicated than that, but it's basically it). This way, you can return HTML Safe strings from helpers or models at will.
h can only be used from within a controller or view, since it's from a helper. It will force the output to b...
Vagrant reverse port forwarding?
...ou wanted to connect to port 12345 on the guest and have it forwarded to localhost:80, you would use this command:
ssh -p 2222 -R 12345:localhost:80 -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o LogLevel=ERROR -o IdentitiesOnly=yes -i ~/.vagrant.d/insecure_private_key vagrant@127.0...
Namespace + functions versus static methods on a class
...eference to this principle in an article from Herb Sutter: http://www.gotw.ca/gotw/084.htm
The important thing to know is that: In C++ functions in the same namespace as a class belong to that class' interface (because ADL will search those functions when resolving function calls).
Namespaced func...
Should I use @EJB or @Inject
...sed to inject EJB's only and is available for quite some time now. @Inject can inject any managed bean and is a part of the new CDI specification (since Java EE 6).
In simple cases you can simply change @EJB to @Inject. In more advanced cases (e.g. when you heavily depend on @EJB's attributes like ...
What's the difference between IQueryable and IEnumerable
I'm confused as to the difference. Being fairly new to .Net, I know I can query IEnumerables using the Linq extensions. So what is this IQueryable and how does it differ?
...
Remove padding or margins from Google Charts
...and tuning some configuration options listed in the API documentation, you can create a lot of different styles. For instance, here is a version that removes most of the extra blank space by setting the chartArea.width to 100% and chartArea.height to 80% and moving the legend.position to bottom:
...
How to Get the Title of a HTML Page Displayed in UIWebView?
...
NSString * subString = [htmlCode substringWithRange:NSMakeRange(range1.location + 7, range2.location - range1.location - 7)];
NSLog(@"substring is %@",subString);
I Used +7 and -7 in NSMakeRange to eliminate the length of <title> i.e 7
...
What is the purpose of willSet and didSet in Swift?
...et, you need another field to hold the value. With willSet and didSet, you can take action when the value is modified without needing another field. For instance, in that example:
class Foo {
var myProperty: Int = 0 {
didSet {
print("The value of myProperty changed from \(ol...
How to pass table value parameters to stored procedure from .net code
...
DataTable, DbDataReader, or IEnumerable<SqlDataRecord> objects can be used to populate a table-valued parameter per the MSDN article Table-Valued Parameters in SQL Server 2008 (ADO.NET).
The following example illustrates using either a DataTable or an IEnumerable<SqlDataRecord>:
...
What is the difference between JOIN and JOIN FETCH when using JPA and Hibernate
...ry to hit the database again to see the Departments of each Employee.
You can use the second query when you are sure that you will need the Department of each Employee. If you not need the Department, use the first query.
I recomend read this link if you need to apply some WHERE condition (what yo...