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MongoDB: Find a document by non-existence of a field?
...operator:
db.mycollection.find({ "price" : { "$exists" : false } })
and see its documentation.
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Django: Redirect to previous page after login
...ere on SO.
The user should be able to browse the site as an anonymous user and there will be a login link on every page. When clicking on the login link the user will be taken to the login form. After a successful login the user should be taken back to the page from where he clicked the login link i...
When to use Vanilla JavaScript vs. jQuery?
...ing javascript, instead of jQuery, that actually enable you to write less and do ... well the same amount. And may also yield performance benefits.
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PHP abstract properties
...s of data reserved in memory on initialization.
A function on the other hand can be declared (types, name, parameters) without being defined (function body missing) and thus, can be made abstract.
"Abstract" only indicates that something was declared but not defined and therefore before using it,...
Disable pasting text into HTML form
... To do so, I wrote a cross-browser* implementation of Internet Explorer's (and others') onpaste event handler. My solution had to be independent of any third-party JavaScript libraries.
Here's what I came up with. It doesn't completely disable pasting (the user can paste a single character at a tim...
What is the status of JSR 305?
...ion JSR305 vs. JSR308 (Java Type Anotations) - Which is going to be the standard? and I understand the difference between JSR 308 and JSR 305 .
...
How to sort an array of objects with jquery or javascript [duplicate]
...s been known to break under certain browsers. I'm using IE8 for a project, and it doesn't work for this scenario.
– Paolo del Mundo
Aug 13 '12 at 14:30
1
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Unique Constraint in Entity Framework Code First
...h unique constraints... you may want to create indexes, check constraints, and possibly triggers and other constructs too. Here's a simple pattern you can use with your code-first setup, though admittedly it's not database agnostic:
public class MyRepository : DbContext {
public DbSet<Whate...
Zipping streams using JDK8 with lambda (java.util.stream.Streams.zip)
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I needed this as well so I just took the source code from b93 and put it in a "util" class. I had to modify it slightly to work with the current API.
For reference here's the working code (take it at your own risk...):
public static<A, B, C> Stream<C> zip(Stream<? exte...
How to send JSON instead of a query string with $.ajax?
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You need to use JSON.stringify to first serialize your object to JSON, and then specify the contentType so your server understands it's JSON. This should do the trick:
$.ajax({
url: url,
type: "POST",
data: JSON.stringify(data),
contentType: "application/json",
complete: cal...