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Create singleton using GCD's dispatch_once in Objective-C
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This is a perfectly acceptable and thread-safe way to create an instance of your class. It may not technically be a "singleton" (in that there can only ever be 1 of these objects), but as long as you only use the [Foo sharedFoo] method to access the objec...
Can't use Swift classes inside Objective-C
...try to integrate Swift code in my app.My app is written in Objective-C and I added a Swift class. I've done everything described here . But my problem is that Xcode haven't created the -Swift.h file, only the bridging headers. So I created it, but it's actually empty.
I can use all my Obj...
Spring Test & Security: How to mock authentication?
...ntrollers are properly secured. Just in case someone changes things around and accidentally removes security settings.
7 A...
Changing git commit message after push (given that no one pulled from remote)
I have made a git commit and subsequent push. I would like to change the commit message. If I understand correctly, this is not advisable because someone might have pulled from the remote repository before I make such changes. What if I know that no one has pulled?
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Go build: “Cannot find package” (even though GOPATH is set)
...e your foobar.go source file is not in a directory called foobar. go build and go install try to match directories, not source files.
Set $GOPATH to a valid directory, e.g. export GOPATH="$HOME/go"
Move foobar.go to $GOPATH/src/foobar/foobar.go and building should work just fine.
Additional reco...
What to do with branch after merge
I had two branches: master and branch1 . I just merged branch1 back into master and I'm done with that branch. Should I delete it or just let it sit around? Will deleting it cause any loss of data?
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XMLHttpRequest status 0 (responseText is empty)
Cannot get data with XMLHttpRequest (status 0 and responseText is empty):
19 Answers
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Which Visual C++ file types should be committed to version control?
...ttings
Several of these are iffy because they can both be auto-generated and maintained yourself. And there are several more that don't appear in your list. Primarily pay attention to the location of the file. If it is in your solution or project directory then it's highly likely you want to ch...
MySQL Update Inner Join tables query
...px = g.latitude,
b.mapy = g.longitude
WHERE (b.mapx = '' or b.mapx = 0) and
g.latitude > 0
Update:
Since you said the query yielded a syntax error, I created some tables that I could test it against and confirmed that there is no syntax error in my query:
mysql> create table business ...
Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
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Several ill-conceived ideas found their way into the standard: auto_ptr, vector<bool>, valarray and export, just to name a few. So I wouldn't take the presence of IOStreams necessarily as a sign of quality design.
IOStreams have a checkered history. They are actually a rew...