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Is git-svn dcommit after merging in git dangerous?
...l free to explore other workflows: If you know what you are doing, you can mix git merges with svn merges (Using git-svn (or similar) just to help out with svn merge?)
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Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC?
...ync() is synchronous). The use of dispatch_once() replaces the following idiom:
+ (MyClass *)sharedInstance {
static MyClass *sharedInstance;
@synchronized(self) {
if (sharedInstance == nil) {
sharedInstance = [[MyClass alloc] init];
}
}
return sharedInst...
What is Mocking?
...
Prologue: If you look up the noun mock in the dictionary you will find that one of the definitions of the word is something made as an imitation.
Mocking is primarily used in unit testing. An object under test may
have dependencies on other (complex) objects. To isolate the...
记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...avoid performance problems: numactl –interleave=all mongod [other options]
当时我并不太清楚NUMA是什么东西，所以没有处理，只是把问题反馈给了运维人员，后来知道运维人员也没有理会这茬儿，所以问题的序幕就这样拉开了。
迁移工作...
What are some compelling use cases for dependent method types?
...s: Set[Edge]
}
Somewhere else we can statically guarantee that we aren't mixing up nodes from two different graphs, e.g.:
def shortestPath(g: Graph)(n1: g.Node, n2: g.Node) = ...
Of course, this already worked if defined inside Graph, but say we can't modify Graph and are writing a "pimp my l...
Are PDO prepared statements sufficient to prevent SQL injection?
...hat should have been data, as if it was code. This is only possible if you mix code and data in the same medium (Eg. when you construct a query as a string).
Parameterised queries work by sending the code and the data separately, so it would never be possible to find a hole in that.
You can still ...
How expensive is RTTI?
...xtra cost for RTTI, and it's not due to just having an if statement in the mix. It's due to that RTTI is very expensive.
This test was done on the Apple LLVM 5.0 compiler, with stock optimizations turned on (default release mode settings).
So, I have below 2 functions, each of which figures out th...
How to “properly” create a custom object in JavaScript?
...aper over some of the uglier parts of the language.
The result is that in mixed company you will have a mishmash of metaclasses, all behaving slightly differently. What's worse, most JavaScript tutorial material is terrible and serves up some kind of in-between compromise to cover all bases, leavin...
Understanding the meaning of the term and the concept - RAII (Resource Acquisition is Initialization
...rks don't seek to combine GC and RAII, since most applications will have a mix of immutable objects (where GC would be best) and objects that need cleanup (where RAII is best).
– supercat
Oct 11 '12 at 21:03
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“Could not find bundler” error
...
if you create a new applocation - rails new and if you get this error?
– AMIC MING
Mar 19 '13 at 0:35
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