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How can i tell if an object has a key value observer attached
...lly, expect the observer's state to go stale as it doesn't receive updates from the formerly-observed object.
If you're doing this in the observing object's class, simply remember which objects you're observing (or, if you only ever observe one object, whether you're observing it). This is assuming...
What is an existential type?
...ytecode type is, but it doesn't need to; all it does is relay the bytecode from VirtualMachine.compile to VirtualMachine.run.
Java type wildcards (ex: List<?>) are a very limited form of existential types.
Update: Forgot to mention that you can sort of simulate existential types with univers...
Git stash: “Cannot apply to a dirty working tree, please stage your changes”
... stashed changes to a dirty working copy, e.g. pop more than one changeset from the stash, I use the following:
$ git stash show -p | git apply -3 && git stash drop
Basically it
creates a patch
pipes that to the apply command
if there are any conflicts they will need to be resolved via...
Changing MongoDB data store directory
...ill allow you to control what directory MongoDB reads and writes it's data from.
mongod --dbpath /usr/local/mongodb-data
Would start mongodb and put the files in /usr/local/mongodb-data.
Depending on your distribution and MongoDB installation, you can also configure the mongod.conf file to d...
Compiled vs. Interpreted Languages
...es during overall program execution. It (probably) only gets compiled once from bytecode to machine code. Hence the runtime overhead of JIT is small, and can be ignored for long-running programs. After the JIT compiler has finished doing its job, you will effectively be running pure machine code all...
@RequestParam vs @PathVariable
...
@PathVariable is to obtain some placeholder from the URI (Spring call it an URI Template)
— see Spring Reference Chapter 16.3.2.2 URI Template Patterns
@RequestParam is to obtain a parameter from the URI as well — see Spring Reference Chapter 16.3.3.3 Binding reque...
Using pre-compiled headers with CMake
...kd6c.aspx use of "/Fp" is not mandatory. However, if I cut out those flags from your macro no pch is set.
– Vram Vardanian
Apr 14 '15 at 15:56
...
Git Gui: Perpetually getting “This repository currently has approximately 320 loose objects.”
...e performance issue to you. This should be fixable by running this command from the command line:
cd path/to/your/git/repo
git gc --aggressive
From the output of git help gc:
Runs a number of housekeeping tasks within the current repository, such as compressing file revisions (to reduce disk space...
Is the Javascript date object always one day off?
...
Creating it as just UTC from a string would be what I'd like to do, hence why I asked "How do you "specify the correct timezone"?" regarding where you stated "you just never specified the correct time zone.". If I do new Date('2012-01-01 GMT') it s...
Encoding an image file with base64
...ethods).
That being said, you can use cStringIO to create such an object from a memory buffer:
import cStringIO
import PIL.Image
# assume data contains your decoded image
file_like = cStringIO.StringIO(data)
img = PIL.Image.open(file_like)
img.show()
...