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How do I extract a sub-hash from a hash?
...=> {:a=>1, :b=>2}
x
# => {:a=>1, :b=>2}
ActiveSupport does not require whole Rails, is pretty lightweight. In fact, a lot of non-rails gems depend on it, so most probably you already have it in Gemfile.lock. No need to extend Hash class on your own.
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How to set the prototype of a JavaScript object that has already been instantiated?
...object is used when creating new child objects of that object. Changing it does not reflect in the object itself, rather is reflected when that object is used as a constructor for other objects, and has no use in changing the prototype of an existing object.
function myFactory(){};
myFactory.protot...
How do I find the PublicKeyToken for a particular dll?
... of the following locations under C:\Program Files (x86)\Microsoft SDKs\Windows: C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Bin, C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\Bin\x64, C:\Program Files (x86)\Microsoft SDKs\Windows\v8.0A\bin\NETFX 4.0 Tools
– davi...
for each loop in Objective-C for accessing NSMutable dictionary
...
for (NSString* key in xyz) {
id value = xyz[key];
// do stuff
}
This works for every class that conforms to the NSFastEnumeration protocol (available on 10.5+ and iOS), though NSDictionary is one of the few collections which lets you enumerate keys instead of values. I sugges...
Returning value from Thread
...hread and I'd like to return it to the test() method. Is there a way to do this?
8 Answers
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Can't compile project when I'm using Lombok under IntelliJ IDEA
...o use Project Lombok with IntelliJ IDEA:
Visit https://projectlombok.org/download
Download the JAR file into the project lib directory (e.g., $HOME/dev/java/project/libs).
Start the IDE.
Click File ???? Settings.
Expand Build, Execution, Deployment ???? Compiler ???? Annotation Processors.
Ensure ...
How do I obtain crash-data from my Android application?
...g Android Application to automatically post their crash reports to a GoogleDoc form. It is targetted to android applications developers to help them get data from their applications when they crash or behave erroneously.
It's easy to install in your app, highly configurable and don't require you ...
How can I get browser to prompt to save password?
...submit(function(event){event.preventDefault();});
someFunctionForLogin() does the ajax login and reload/redirect to the signed in page while event.preventDefault() blocks the original redirection due to submitting the form.
If you deal with Firefox only, the above solution is enough but it doesn'...
Change File Extension Using C#
...or cannot find the file on specified path. so i am thinking it has some to do with the file extension is not matching. so i am trying to convert jpg to Jpeg and delete the file then.
– safi
Mar 10 '11 at 13:26
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How do I use a custom Serializer with Jackson?
...
As mentioned, @JsonValue is a good way. But if you don't mind a custom serializer, there's no need to write one for Item but rather one for User -- if so, it'd be as simple as:
public void serialize(Item value, JsonGenerator jgen,
SerializerProvider provider) throws IOEx...