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When to use ' (or quote) in Lisp?
...ough the major parts of an introductory Lisp book, I still couldn't understand what the special operator (quote) (or equivalent ' ) function does, yet this has been all over Lisp code that I've seen.
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Real world use of JMS/message queues? [closed]
I was just reading abit about JMS and Apache ActiveMQ.
And was wondering what real world use have people here used JMS or similar message queue technologies for ?
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Execute script after specific delay using JavaScript
...p "threads" or that it should work "synchronously" may be true technically and semantically but don't really fit within the context of JavaScript, considering there really is no way to achieve a delay with either of those methods (you don't create "threads" in JS like you do in other languages). Als...
How to run multiple .BAT files within a .BAT file
...ts.bat
call deploy.bat
When not using CALL, the current batch file stops and the called batch file starts executing. It's a peculiar behavior dating back to the early MS-DOS days.
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list.clear() vs list = new ArrayList(); [duplicate]
Which one of the 2 options is better and faster to clear an ArrayList, and why?
8 Answers
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CSS3 gradient background set on body doesn't stretch but instead repeats?
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In Chrome and Safari, body { height: 100% } results in the page (but not the gradient) extending down out of the viewport.
– thSoft
Dec 17 '10 at 10:46
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Where can I download Spring Framework jars without using Maven?
...Alternate solution: Maven
The solution I prefer is using Maven, it is easy and you don't have to download each jar alone. You can do it with the following steps:
Create an empty folder anywhere with any name you prefer, for example spring-source
Create a new file named pom.xml
Copy the xml below ...
Subprocess changing directory
...ode tries to do is call a program named cd ... What you want is call a command named cd.
But cd is a shell internal. So you can only call it as
subprocess.call('cd ..', shell=True) # pointless code! See text below.
But it is pointless to do so. As no process can change another process's working ...
How do pointer to pointers work in C?
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Let's assume an 8 bit computer with 8 bit addresses (and thus only 256 bytes of memory). This is part of that memory (the numbers at the top are the addresses):
54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69
+----+----+----+----+----+----+----+...
How to store a dataframe using Pandas
... it back using:
df = pd.read_pickle(file_name)
Note: before 0.11.1 save and load were the only way to do this (they are now deprecated in favor of to_pickle and read_pickle respectively).
Another popular choice is to use HDF5 (pytables) which offers very fast access times for large datasets:
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