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How to add a 'or' condition in #ifdef
...ned. If you want it to happen if neither of them are defined, you'd use an AND: #if !defined(CONDITION1) && !defined(CONDITION2).
– cp.engr
Feb 20 '17 at 18:26
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How to track untracked content?
...en_flash_chart_2
git add vendor/plugins/open_flash_chart_2
This last command is the problem. The directory vendor/plugins/open_flash_chart_2 starts out as an independent Git repository. Usually such sub-repositories are ignored, but if you tell git add to explicitly add it, then it will create an ...
Check if OneToOneField is None in Django
...elect_related() now or in the future -- or maybe even to be sure you also handle other sorts of magic which may happen elsewhere -- you have to extend the test as follows: if hasattr(object, 'onetoonerevrelattr') and object.onetoonerevrelattr != None
– class stacker
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Adding a directory to $LOAD_PATH (Ruby)
...y because I've seen much more usage of it in code than the $LOAD_PATH one, and it's shorter too!
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Python Linked List
...st is defined simply by '(1 2 3 4 5) . Python's lists, [1, 2, 3, 4, 5] , and tuples, (1, 2, 3, 4, 5) , are not, in fact, linked lists, and linked lists have some nice properties such as constant-time concatenation, and being able to reference separate parts of them. Make them immutable and they a...
Behaviour of increment and decrement operators in Python
...erator is the identity operator, which does nothing. (Clarification: the + and - unary operators only work on numbers, but I presume that you wouldn't expect a hypothetical ++ operator to work on strings.)
++count
Parses as
+(+count)
Which translates to
count
You have to use the slightly lo...
Can scrapy be used to scrape dynamic content from websites that are using AJAX?
I have recently been learning Python and am dipping my hand into building a web-scraper. It's nothing fancy at all; its only purpose is to get the data off of a betting website and have this data put into Excel.
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What is the formal difference in Scala between braces and parentheses, and when should they be used?
...rmal difference between passing arguments to functions in parentheses () and in braces {} ?
9 Answers
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What is the difference between __dirname and ./ in node.js?
When programming in Node.js and referencing files that are located somewhere in relation to your current directory, is there any reason to use the __dirname variable instead of just a regular ./ ? I've been using ./ thus far in my code and just discovered the existence of __dirname , and essenti...
Does C have a “foreach” loop construct?
... \
for(T * item = list->head; item != NULL; item = item->next)
And can be used like
for_each_item(i, processes) {
i->wakeup();
}
Iteration over an array is also possible:
#define foreach(item, array) \
for(int keep = 1, \
count = 0,\
size = sizeof (...