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Change an HTML5 input's placeholder color with CSS
... size your input elements in em and test them with big minimum font size settings. Don’t forget translations: some languages need more room for the same word.
Browsers with HTML support for placeholder but without CSS support for that (like Opera) should be tested too.
Some browsers use additiona...
How to persist a property of type List in JPA?
...
It seems none of the answers explored the most important settings for a @ElementCollection mapping.
When you map a list with this annotation, and let JPA/Hibernate auto generates the tables, columns, etc., it'll use auto generated names as well.
So, let's analyze a basic example:...
Determine what attributes were changed in Rails after_save callback?
I'm setting up an after_save callback in my model observer to send a notification only if the model's published attribute was changed from false to true. Since methods such as changed? are only useful before the model is saved, the way I'm currently (and unsuccessfully) trying to do so is as fol...
Can I have multiple primary keys in a single table?
... came here looking to see if I could uniquely identify a row with one of a set of keys. For instance, I would like to identify a unique user with either a username OR a userid, without needing both. I guess RB's answer of unique indexes would do the trick there.
– Burrito
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How to use a link to call JavaScript?
..."mylink"
var a = document.getElementById("mylink");
//Set code to run when the link is clicked
// by assigning a function to "onclick"
a.onclick = function() {
// Your code here...
//If you don't want the link to actually
...
HTTP redirect: 301 (permanent) vs. 302 (temporary)
...s are cached indefinitely (at least by some browsers).
This means, if you set up a 301, visit that page, you not only get redirected, but that redirection gets cached.
When you visit that page again, your Browser* doesn't even bother to request that URL, it just goes to the cached redirection targ...
How to pass anonymous types as parameters?
... @JonSkeet. I suppose you could use reflection to still access/set the properties if T is an anonymous type right? I'm thinking of a case where someone writes a "Select * from" statement and uses an anonymous (or defined) class to define which columns from the query result map to the sam...
How to do a Jquery Callback after form submit?
...or MVC here was an even easier approach.
You need to use the Ajax form and set the AjaxOptions
@using (Ajax.BeginForm("UploadTrainingMedia", "CreateTest", new AjaxOptions() { HttpMethod = "POST", OnComplete = "displayUploadMediaMsg" }, new { enctype = "multipart/form-data", id = "frmUploadTrainingM...
Error: allowDefinition='MachineToApplication' beyond application level
...er errors waiting for me after this but they were unrelated. I got here by setting MvcBuildViews to true.
– Benjamin
Apr 1 '13 at 13:42
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Is there a way to check if WPF is currently executing in design mode or not?
...xt="{d:DesignData Source=../DesignData/SamplePage.xaml}">
You have to set the SamplePage.xaml file properties to:
BuildAction: DesignData
Copy to Output Directory: Do not copy
Custom Tool: [DELETE ANYTHING HERE SO THE FIELD IS EMPTY]
I place these in my UserCont...