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Difference between objectForKey and valueForKey?

...n do the following: NSNumber *anAccountNumber = [NSNumber numberWithInt:12345]; Account *newAccount = [[Account alloc] init]; [newAccount setAccountNumber:anAccountNUmber]; NSNumber *anotherAccountNumber = [newAccount accountNumber]; Using KVC, I can access the property dynamically: NSNumber *...
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How does one generate a random number in Apple's Swift language?

... = Int.random(in: 0..<6) let randomDouble = Double.random(in: 2.71828...3.14159) let randomBool = Bool.random() share | improve this answer | follow | ...
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Add new field to every document in a MongoDB collection

...> db.foo.insert({"test":"a"}) > db.foo.find() { "_id" : ObjectId("4e93037bbf6f1dd3a0a9541a"), "test" : "a" } > item = db.foo.findOne() { "_id" : ObjectId("4e93037bbf6f1dd3a0a9541a"), "test" : "a" } > db.foo.update({"_id" :ObjectId("4e93037bbf6f1dd3a0a9541a") },{$set : {"new_field":1}}) &...
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Retrieving Android API version programmatically

...re your application is not retro-compatible with Cupcake (android 1.5 / API3) when you use it or your application will crash (thanks to Programmer Bruce for the precision). Corresponding android documentation is here and here ...
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“ClickOnce does not support the request execution level 'requireAdministrator.'”

... edited Nov 26 '14 at 14:43 answered Jun 14 '12 at 15:59 LM...
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Using “like” wildcard in prepared statement

... | edited Dec 23 '15 at 22:23 Alain O'Dea 17.5k11 gold badge3939 silver badges6565 bronze badges ...
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List of remotes for a Git repository?

... Scharley 111k5151 gold badges188188 silver badges213213 bronze badges 20 ...
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When should I use perror(“…”) and fprintf(stderr, “…”)?

... 113 Calling perror will give you the interpreted value of errno, which is a thread-local error value...
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Why does an NSInteger variable have to be cast to long when used as a format argument?

...s a 64-bit integer. The %i format, on the other hand, is for int, which is 32-bit. So the format and the actual parameter do not match in size. Since NSInteger is 32-bit or 64-bit, depending on the platform, the compiler recommends to add a cast to long generally. Update: Since iOS 7 supports 64-b...
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Mockito + PowerMock LinkageError while mocking system class

... 423 Try adding this annotation to your Test class: @PowerMockIgnore("javax.management.*") Worked f...