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If i synchronized two methods on the same class, can they run simultaneously?
If i synchronized two methods on the same class, can they run simultaneously on the same object ? for example:
12 Answers
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How to find out which processes are using swap space in Linux?
Under Linux, how do I find out which process is using the swap space more?
17 Answers
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Best way to make Django's login_required the default
I'm working on a large Django app, the vast majority of which requires a login to access. This means that all throughout our app we've sprinkled:
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What is the difference between buffer and cache memory in Linux?
To me it's not clear what's the difference between the two Linux memory concepts : buffer and cache . I've read through this post and it seems to me that the difference between them is the expiration policy:
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How to create named and latest tag in Docker?
...t's an image containing Node.js 0.10.24). I built that image using a Dockerfile and executing docker build and by providing a tag using the -t parameter.
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How do I get the directory that a program is running from?
...d filesystem-agnostic method to obtain the full path of the directory from where a program is running using C/C++? Not to be confused with the current working directory. (Please don't suggest libraries unless they're standard ones like clib or STL.)
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Using helpers in model: how do I include helper dependencies?
I'm writing a model that handles user input from a text area. Following the advice from http://blog.caboo.se/articles/2008/8/25/sanitize-your-users-html-input , I'm cleaning up the input in the model before saving to database, using the before_validate callback.
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Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
I'm having a little trouble understanding the pass-by-reference properties of data.table . Some operations seem to 'break' the reference, and I'd like to understand exactly what's happening.
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PostgreSQL: Can you create an index in the CREATE TABLE definition?
I want to add indexes to some of the columns in a table on creation. Is there are way to add them to the CREATE TABLE definition or do I have to add them afterward with another query?
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Git: How to remove file from index without deleting files from any repository
... not think a Git commit can record an intention like “stop tracking this file, but do not delete it”.
Enacting such an intention will require intervention outside Git in any repositories that merge (or rebase onto) a commit that deletes the file.
Save a Copy, Apply Deletion, Restore
Probabl...