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Struct like objects in Java
...ee all possible actions. It's like defensive programming - someday getters and setters may be helpful, and it doesn't cost a lot to create/use them. So they are sometimes useful.
In practice, most fields have simple getters and setters. A possible solution would look like this:
public property St...
Accessing an SQLite Database in Swift
...the SQLite library yourself, you would:
Configure your Swift project to handle SQLite C calls. If using Xcode 9 or later, you can simply do:
import SQLite3
Create/open database.
let fileURL = try! FileManager.default
.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFo...
Best practices for API versioning? [closed]
...
This is a good and a tricky question. The topic of URI design is at the same time the most prominent part of a REST API and, therefore, a potentially long-term commitment towards the users of that API.
Since evolution of an application and...
ARC and bridged cast
...ained <CFType>) op or alternatively CFBridgingRetain(op) is used to hand an NSObject over to CF-land while giving it a +1 retain count. You should handle a CFTypeRef you create this way the same as you would handle a result of CFStringCreateCopy(). This could also be represented by CFRetain((_...
How should I escape commas and speech marks in CSV files so they work in Excel?
...en the CSV file in Excel by double clicking it. My data may contain commas and speech marks, so I'm escaping those as follows.
...
What does void* mean and how to use it?
...d *func(void* i); , what does this void* mean here for the function name and for the variable type, respectively?
10 Ans...
Swift double to string
...ntrolled with the printf formatting options, see: String Format Specifiers and printf(3).
– zaph
Mar 21 '15 at 13:14
...
Ruby: Easiest Way to Filter Hash Keys?
...t { |key, value| key.to_s.match(/^choice\d+/) }
or you can use delete_if and modify the existing Hash e.g.
params.delete_if { |key, value| !key.to_s.match(/choice\d+/) }
or if it is just the keys and not the values you want then you can do:
params.keys.select { |key| key.to_s.match(/^choice\d+...
How do I obtain the frequencies of each value in an FFT?
... an FFT result. These are stored in two double arrays: a real part array and an imaginary part array. How do I determine the frequencies that correspond to each element in these arrays?
...
How to print a string in fixed width?
...
EDIT 2013-12-11 - This answer is very old. It is still valid and correct, but people looking at this should prefer the new format syntax.
You can use string formatting like this:
>>> print '%5s' % 'aa'
aa
>>> print '%5s' % 'aaa'
aaa
>>> print '%5s' % '...