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__FILE__, __LINE__, and __FUNCTION__ usage in C++
...me voodoo between lines that do not appear in original source files. For example:
#line 100
Will make the following lines start with __LINE__ 100. You can optionally add a new file-name
#line 100 "file.c"
It's only rarely useful. But if it is needed, there are no alternatives I know of. Actual...
How to convert a file into a dictionary?
...t by normal execution flow or by an exception) there file will be automatically closed. You can read more about context-managers in Python here: effbot.org/zone/python-with-statement.htm
– Vlad H
Jan 26 '11 at 11:49
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How to make a JSONP request from Javascript without JQuery?
...h JSON
}
var script = document.createElement('script');
script.src = '//example.com/path/to/jsonp?callback=foo'
document.getElementsByTagName('head')[0].appendChild(script);
// or document.head.appendChild(script) in modern browsers
...
What is the purpose of class methods?
...
Factory methods (alternative constructors) are indeed a classic example of class methods.
Basically, class methods are suitable anytime you would like to have a method which naturally fits into the namespace of the class, but is not associated with a particular instance of the class.
As a...
How can I convert an image into Base64 string using JavaScript?
...on firefox 35 on some images, the base64 is different from the base64 that php creates on the same image.
– hanshenrik
Mar 6 '15 at 2:39
1
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How to log something in Rails in an independent log file?
...s/ directory.
The benefit is that you can setup formatter to prefix timestamps or severity to the logs automatically. This is accessible from anywhere in Rails, and looks neater by using the singleton pattern.
# Custom Post logger
require 'singleton'
class PostLogger < Logger
include Singleto...
Grid of responsive squares
...e would have vertically and horizontally aligned content. The specific example is displayed below...
4 Answers
...
warning: implicit declaration of function
...or which the compiler has not seen a declaration ("prototype") yet.
For example:
int main()
{
fun(2, "21"); /* The compiler has not seen the declaration. */
return 0;
}
int fun(int x, char *p)
{
/* ... */
}
You need to declare your function before main, like this, either dire...
How to print a float with 2 decimal places in Java?
...lNumber));
Another one is to construct it using the #.## format.
I find all formatting options less readable than calling the formatting methods, but that's a matter of preference.
share
|
improv...
Passing parameters to JavaScript files
...
I have made an example of this idea: http://plnkr.co/edit/iE0Vr7sszfqrrDIsR8Wi?p=preview
– robe007
Dec 7 '15 at 14:31
1
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