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UITapGestureRecognizer - single tap and double tap
I am trying to add 2 UITapGestureRecognizers to a view, one for single tap and one for double tap events. The single tap recognizer is working as expected (on its own). But I don't seem to be able to get the double tap recognizer working.
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Why does this Java code compile?
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tl;dr
For fields, int b = b + 1 is illegal because b is an illegal forward reference to b. You can actually fix this by writing int b = this.b + 1, which compiles without complaints.
For local variables, int d = d + 1 is illegal b...
Django: “projects” vs “apps”
...t want to import.
Similarly, if you can create something like a blog in a format that is pretty generic across installs, you can wrap it up in an app, with its own template, static content folder etc, and configure an instance of a django project to use that app's content.
There are no hard and fa...
Do I cast the result of malloc?
...s you repeat yourself, which is generally bad.
It can hide an error if you forgot to include <stdlib.h>. This can cause crashes (or, worse, not cause a crash until way later in some totally different part of the code). Consider what happens if pointers and integers are differently sized; then ...
What does “:=” do?
...t's not exactly possible to google its use without knowing the proper name for it.
10 Answers
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Are PHP Variables passed by value or by reference?
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I'm wondering if pass by reference has some performance benefits or not? I'm passing a large array & by default it is pass by value. So, if I use call by reference then, will there be some performance wise benefit??? (keeping the array values unchanged during the whol...
How can I reliably get an object's address when operator& is overloaded?
...nstantin: According to 13.3.3.2 both T & and T * are indistinguishable for functions. The 1st one is an Identity conversion and the 2nd one is Function-to-Pointer conversion both having "Exact Match" rank (13.3.3.1.1 table 9).
The reference to function pass through addr_impl_ref, there is an am...
How to fix the “java.security.cert.CertificateException: No subject alternative names present” error
...);
}
}
Since I'm using the https://AAA.BBB.CCC.DDD:9443/ISomeService for testing purposes only, it's a good enough solution.
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What is Lazy Loading?
...The opposite is Eager Loading, where you load something right away, long before you need it.
If you are curious why people might use lazy loading, consider an application that takes a LOOOOONG time to start. This application is probably doing a lot of eager loading... loading things from disk, and...
VS2005混合编译ARM汇编代码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...here's a pipe stall here)
add r0,r0,r1 ; we're not concerned with performance in this example
mov pc,lr ; return to C with the value in R0
endp
LTORG ; allow room for the address constant of our global (loaded relative to PC)
END
将armtest.asm加入VS2005...