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What's the difference between git clone --mirror and git clone --bare
... cloned repo has it all. It's also set up so that a remote update will re-fetch everything from the origin (overwriting the copied refs). The idea is really to mirror the repository, to have a total copy, so that you could for example host your central repo in multiple places, or back it up. Think o...
What is base 64 encoding used for?
...al: store the decimal value of each byte as three numbers: 045 112 101 037 etc. where each byte is represented by 3 bytes. The data bloats three-fold.
Hexadecimal: store the bytes as hex pairs: AC 47 0D 1A etc. where each byte is represented by 2 bytes. The data bloats two-fold.
Base-64 maps 3 byt...
Check to see if python script is running
...ns up its pidfile under any circumstances (when killed, exceptions raised, etc.).
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Storing Images in PostgreSQL
...m with backing up blobs!), PostgreSQL additional supplied modules, How-tos etc.
use a separate database with DBlink: for original image store, at another (unified/specialized) database. In this case, I prefer bytea, but blob is near the same. Separating database is the best way for a "unified imag...
Implementing Comments and Likes in database
...ity tables Photo, Article, Place have their own PK e.g. PhotoID, ArticleID etc but also have another column for the Entity_ID as a FK? Is this unnecessary?
– volume one
Sep 17 '14 at 21:03
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Why is using the JavaScript eval function a bad idea?
... for injection attacks
Debugging can be more challenging
(no line numbers, etc.)
eval'd code executes slower (no opportunity to compile/cache eval'd code)
Edit: As @Jeff Walden points out in comments, #3 is less true today than it was in 2008. However, while some caching of compiled scripts may ha...
Performing a Stress Test on Web Application?
...o create a request, how to create an assertion, how to work with variables etc).
Very scalable. I've run tests with 11 machines generating load on the server to the tune of almost a million hits/hour. It was much easier to setup than I was expecting.
Has an active community and good resources to hel...
What is an OS kernel ? How does it differ from an operating system? [closed]
...le users to get something done (i.e compiler, text editor, window manager, etc).
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What is stack unwinding?
...manage resources like memory, database connections, open file descriptors, etc. in C++.
Now that allows us to provide exception safety guarantees.
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Using Emacs to recursively find and replace in text files not already open
...eplace-regexp: SPACE to replace and move to next match, n to skip a match, etc.
Press C-x s to save buffers. (You can then press y, n or ! to save all at once)
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