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Understanding repr( ) function in Python
... When you call for example repr(x) the interpreter puts 'foo' instead of x and then calls repr('foo').
>>> repr(x)
"'foo'"
>>> x.__repr__()
"'foo'"
repr actually calls a magic method __repr__ of x, which gives the string containing the representation of the value 'foo' assigned ...
Why use double indirection? or Why use pointers to pointers?
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Yes, and if you ever lose track of one of your pointers, here's a pointer: pointerpointer.com
– Andrew Cheong
Aug 21 at 0:50
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How to get values from IGrouping
I have a question about IGrouping and the Select() method.
4 Answers
4
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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
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Standard C Preprocessor
$ cat xx.c
#define VARIABLE 3
#define PASTER(x,y) x ## _ ## y
#define EVALUATOR(x,y) PASTER(x,y)
#define NAME(fun) EVALUATOR(fun, VARIABLE)
extern void NAME(mine)(char *x);
$ gcc -E xx.c
# 1 "xx.c"
# ...
What's the difference between globals(), locals(), and vars()?
What is the difference between globals() , locals() , and vars() ? What do they return? Are updates to the results useful?
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Reordering of commits
I'm currently working on a branch and want some commits to merge into other branches:
5 Answers
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Iterate over object attributes in python
I have a python object with several attributes and methods. I want to iterate over object attributes.
8 Answers
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How do I set a conditional breakpoint in gdb, when char* x points to a string whose value equals “he
...x:20 if strcmp(y, "hello") == 0
20 is line number, x can be any filename and y can be any variable.
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How can I do division with variables in a Linux shell?
When I run commands in my shell as below, it returns an expr: non-integer argument error. Can someone please explain this to me?
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Difference between Big-O and Little-O Notation
What is the difference between Big-O notation O(n) and Little-O notation o(n) ?
4 Answers
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