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from list of integers, get number closest to a given value
...m distance from the specified number.
>>> min(myList, key=lambda x:abs(x-myNumber))
4
Note that it also works with dicts with int keys, like {1: "a", 2: "b"}. This method takes O(n) time.
If the list is already sorted, or you could pay the price of sorting the array once only, use the...
How to embed small icon in UILabel
...
You can do this with iOS 7's text attachments, which are part of TextKit. Some sample code:
NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
attachment.image = [UIImage imageNamed:@"MyIcon.png"];
NSAttributedString *attachmentString = [NSA...
How do you check that a number is NaN in JavaScript?
I’ve only been trying it in Firefox’s JavaScript console, but neither of the following statements return true:
30 Answe...
Where is C not a subset of C++? [closed]
... specifiers in array dimensions of parameters
// ill-formed: invalid syntax
void f(int p[static 100]) { }
No variable length arrays
// ill-formed: n is not a constant expression
int n = 1;
int an[n];
No flexible array member
// ill-formed: fam has incomplete type
struct A { int a; int fam[]; ...
How to subtract X day from a Date object in Java?
...d date-time classes such as java.util.Date, java.util.Calendar, and java.text.SimpleTextFormat are now legacy, supplanted by the java.time classes. See Tutorial by Oracle.
– Basil Bourque
Aug 21 '17 at 0:50
...
How to take a screenshot programmatically on iOS
...reen] respondsToSelector:@selector(scale)]) {
UIGraphicsBeginImageContextWithOptions(self.window.bounds.size, NO, [UIScreen mainScreen].scale);
} else {
UIGraphicsBeginImageContext(self.window.bounds.size);
}
[self.window.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image ...
Can lambda functions be templated?
...released this year and now provides Polymorphic lambdas with the same syntax as in this example. Some major compilers already implement it.
At it stands (in C++11), sadly no. Polymorphic lambdas would be excellent in terms of flexibility and power.
The original reason they ended up being monomor...
What does iterator->second mean?
...
I'm sure you know that a std::vector<X> stores a whole bunch of X objects, right? But if you have a std::map<X, Y>, what it actually stores is a whole bunch of std::pair<const X, Y>s. That's exactly what a map is - it pairs together the keys and t...
Typedef function pointer?
...inition given above.
The difficulty lies in the pointer to functions syntax and readability in C and C++, and the typedef can improve the readability of such declarations. However, the syntax is appropriate, since functions - unlike other simpler types - may have a return value and parameters, thus...
.Contains() on a list of custom class objects
... need to implement IEquatable or override Equals() and GetHashCode()
For example:
public class CartProduct : IEquatable<CartProduct>
{
public Int32 ID;
public String Name;
public Int32 Number;
public Decimal CurrentPrice;
public CartProduct(Int32 ID, String Name, Int32 N...