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Safe (bounds-checked) array lookup in Swift, through optional bindings?
...on because you would break all the code that expects a non-optional values from arrays.
Instead, you could subclass Array, and override subscript to return an optional. Or, more practically, you could extend Array with a non-subscript method that does this.
extension Array {
// Safely lookup ...
Convert UTF-8 encoded NSData to NSString
I have UTF-8 encoded NSData from windows server and I want to convert it to NSString for iPhone. Since data contains characters (like a degree symbol) which have different values on both platforms, how do I convert data to string?
...
Inspecting standard container (std::map) contents with gdb
... Thanks for the link; the only thing is that macros are dependent from the stl libraries version, which I'd prefer to avoid. +1
– Paolo Tedesco
Jan 9 '09 at 10:41
...
How to get maximum value from the Collection (for example ArrayList)?
... Naively iterating is faster (checked, comparator was fetching scores from a Map) than either sorting and getting first element or using max. Both sort+take first and max used a lambda.
– majTheHero
Mar 27 '19 at 12:24
...
C libcurl get output into a string
...
From reading the manual here: http://curl.haxx.se/libcurl/c/curl_easy_setopt.html I think you need several calls to CURL_SETOPT, the first being the URL you want to process, the second being something like:
curl_easy_setopt(...
What are the complexity guarantees of the standard containers?
... O(n)
vector<T> v(begin, end); Make a vector and copy the elements from begin to end. O(n)
Accessors
v[i] Return (or set) the I'th element. O(1)
v.at(i) Return (or set) the I'th element, with bounds checking. O(1)
v.size() Return current numb...
Declaring abstract method in TypeScript
... full support for polymorphism and the ability to call implemented methods from the base class. Let's start with the code:
/**
* The interface defines all abstract methods and extends the concrete base class
*/
interface IAnimal extends Animal {
speak() : void;
}
/**
* The abstract base cla...
C++11 std::threads vs posix threads
...ement is boost::thread - it is very similar to std::thread (actually it is from the same author) and works reliably, but, of course, it introduces another dependency from a third party library.
Edit: As of 2017, std::thread mostly works on native Android. Some classes, like std::timed_mutex are s...
viewWillDisappear: Determine whether view controller is being popped or is showing a sub-view contro
...t:self] == NSNotFound) {
// View is disappearing because it was popped from the stack
NSLog(@"View controller was popped");
}
}
This is, of course, possible because the UINavigationController's view controller stack (exposed through the viewControllers property) has been updated by the t...
Reading/parsing Excel (xls) files with Python
...with Pandas using ExcelFile function, but it did not work properly for me. From here I found the read_excel function which works just fine:
import pandas as pd
dfs = pd.read_excel("your_file_name.xlsx", sheet_name="your_sheet_name")
print(dfs.head(10))
P.S. You need to have the xlrd installed for...