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How exactly does tail recursion work?
...eturn address of the function making the tail call, instead of the address from which the tail call was made.
– Steve Jessop
Mar 20 '13 at 9:59
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How can I avoid Java code in JSP files, using JSP 2?
...ity is possible by (tag) classes. Here are several cites of relevance:
From JSP 1.2 Specification, it is highly recommended that the JSP Standard Tag Library (JSTL) be used in your web application to help reduce the need for JSP scriptlets in your pages. Pages that use JSTL are, in general, eas...
Extract a part of the filepath (a directory) in Python
......
And you can continue doing this as many times as necessary...
Edit: from os.path, you can use either os.path.split or os.path.basename:
dir = os.path.dirname(os.path.dirname(file)) ## dir of dir of file
## once you're at the directory level you want, with the desired directory as the final p...
What does DIM stand for in Visual Basic and BASIC?
...(The original implementation of BASIC was Dartmouth BASIC, which descended from FORTRAN, where DIMENSION is spelled out.)
Nowadays, Dim is used to define any variable, not just arrays, so its meaning is not intuitive anymore.
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What do REFRESH and MERGE mean in terms of databases?
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REFRESH means "pull any state changes from the database into my representation". Cascading this is simple; it means that all associated entities are refreshed.
MERGE means something complex that approximates "save" but is more like "push this detached entity ba...
What is the difference between related SQLite data-types like INT, INTEGER, SMALLINT and TINYINT?
...g you used to know about standalone database datatypes
Read the above link from the SQLite site.
Take the types based off of your old schema, and see what they'd map to in SQLite
Migrate all the data to the SQLite database.
Note: The datatype limitations can be cumbersome, especially if you add ti...
I need to pop up and trash away a “middle” commit in my master branch. How can I do it?
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Rebase or revert are the options. Rebase will actually remove the commit from the history so it will look like that second commit never existed. This will be a problem if you've pushed the master branch out to any other repos. If you try to push after a rebase in this case, git will give you a rej...
Could not find method compile() for arguments Gradle
...o using Maven for dependency management, but Gradle seems best me for now. From running this snippet of code:
8 Answers
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Can you make valid Makefiles without tab characters?
... is like one of those pungee stick traps in The Green Berets: the poor kid from Kansas is walking point in front of John Wayne and doesn’t see the trip wire. After all, there are no trip wires to watch out for in Kansas corn fields. WHAM!
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OSError: [Errno 2] No such file or directory while using python subprocess in Django
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Use shell=True if you're passing a string to subprocess.call.
From docs:
If passing a single string, either shell must be True or
else the string must simply name the program to be executed without
specifying any arguments.
subprocess.call(crop, shell=True)
or:
import shlex...