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hasNext in Python iterators?
...icult to write an adaptor that stores the result of next() and provides has_next() and move_next().
– avakar
Dec 24 '12 at 21:10
6
...
warning: implicit declaration of function
...s to declare function prototype in header.
Example
main.h
#ifndef MAIN_H
#define MAIN_H
int some_main(const char *name);
#endif
main.c
#include "main.h"
int main()
{
some_main("Hello, World\n");
}
int some_main(const char *name)
{
printf("%s", name);
}
Alternative with one file...
How do I add custom field to Python log format string?
... pass the extra info with every logging call:
import logging
extra = {'app_name':'Super App'}
logger = logging.getLogger(__name__)
syslog = logging.StreamHandler()
formatter = logging.Formatter('%(asctime)s %(app_name)s : %(message)s')
syslog.setFormatter(formatter)
logger.setLevel(logging.INFO)
l...
Understanding repr( ) function in Python
...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 to x. So it returns 'foo' inside the string "" resulting in "'foo'". The ...
How to throw an exception in C?
...m Wikipedia
#include <stdio.h>
#include <setjmp.h>
static jmp_buf buf;
void second(void) {
printf("second\n"); // prints
longjmp(buf,1); // jumps back to where setjmp
// was called - making setjmp now return 1
}
void firs...
What does “hashable” mean in Python?
...if it has a hash value which never changes during its lifetime (it needs a __hash__() method), and can be compared to other objects (it needs an __eq__() or __cmp__() method). Hashable objects which compare equal must have the same hash value.
Hashability makes an object usable as a dictionary ...
How to detect total available/free disk space on the iPhone/iPad device?
...
Original answer:
I found the following solution working for me:
-(uint64_t)getFreeDiskspace {
uint64_t totalSpace = 0;
uint64_t totalFreeSpace = 0;
NSError *error = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSDic...
How do I create a multiline Python string with inline variables?
...ti-line string
string1 = "go"
string2 = "now"
string3 = "great"
multiline_string = (f"I will {string1} there\n"
f"I will go {string2}.\n"
f"{string3}.")
print(multiline_string)
I will go there
I will go now
great
Variables in a lengthy single-lin...
Aren't Python strings immutable? Then why does a + “ ” + b work?
...
Consider:
>>> a='asdf'
>>> a.__repr__
<method-wrapper '__repr__' of str object at 0x1091aab90>
>>> a='asdf'
>>> a.__repr__
<method-wrapper '__repr__' of str object at 0x1091aab90>
>>> a='qwer'
>>> a.__repr_...
What's the difference between a Python module and a Python package?
...le (or files) that are imported under one import and used.
e.g.
import my_module
A package is a collection of modules in directories that give a package hierarchy.
from my_package.timing.danger.internets import function_of_love
Documentation for modules
Introduction to packages
...