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Count, size, length…too many choices in Ruby?
... 1
In the case where you don't provide a parameter to count it has basically the same effect as calling length. There can be a performance difference though.
We can see from the source code for Array that they do almost exactly the same thing. Here is the C code for the implementation of array....
filtering NSArray into a new NSArray in Objective-C
...similar type you could add a method as a category of their base class that calls the function you're using for your criteria. Then create an NSPredicate object that refers to that method.
In some category define your method that uses your function
@implementation BaseClass (SomeCategory)
- (BOOL)m...
AttributeError(“'str' object has no attribute 'read'”)
...ng for read anywhere, so it must happen in the json.load function that you called (as indicated by the full traceback). That is because json.load is trying to .read the thing that you gave it, but you gave it jsonofabitch, which currently names a string (which you created by calling .read on the res...
javascript scroll event for iPhone/iPad?
...s trying to scroll to, and it would refuse to scroll. I had to add in some calls to myScroller.refresh() whenever I changed the contents of the #wrapper, and that solved the problem.
EDIT: Another gotcha was that iScroll eats all the "click" events. I turned on the option to have iScroll emit a "ta...
Performance optimization strategies of last resort [closed]
... changes was this:
The first problem found was use of list clusters (now called "iterators" and "container classes") accounting for over half the time. Those were replaced with fairly simple code, bringing the time down to 20 seconds.
Now the largest time-taker is more list-building. As a percenta...
How to set cookie in node js using express framework?
...ou use middleware in Express matters: middleware declared earlier will get called first, and if it can handle a request, any middleware declared later will not get called.
If express.static is handling the request, you need to move your middleware up:
// need cookieParser middleware before we can ...
Is there a replacement for unistd.h for Windows (Visual C)?
...n't work for sockets. You need to look at your app and consider whether to call e.g. closesocket(). */
#ifdef _WIN64
#define ssize_t __int64
#else
#define ssize_t long
#endif
#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#define STDERR_FILENO 2
/* should be in some equivalent to <sys/types.h&g...
Entity Framework and Connection Pooling
...ns use single context per request. For web services use single context per call. In WinForms or WPF application use single context per form or per presenter. There can be some special requirements which will not allow to use this approach but in most situation this is enough.
If you want to know w...
Why number 9 in kill -9 command in unix? [closed]
...
The underlying system call that sends signals is also called kill. Probably because the default behavior for most of the original set of signals (numbers 1 through 15) was to terminate the process.
– zwol
Ma...
How to add a custom right-click menu to a webpage?
...al logic which checks, if key is pressed while right clicking and then NOT calling e.preventDefault() - you will get regular browser menu then.
– Radek Benkel
Nov 28 '14 at 9:14
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