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Abstract classes in Swift Language
...a Java Interface.
With Swift 2.0, you can then add method implementations and calculated property implementations using protocol extensions. Your only restrictions are that you can't provide member variables or constants and there is no dynamic dispatch.
An example of this technique would be:
pro...
How can I check whether a numpy array is empty or not?
...an always take a look at the .size attribute. It is defined as an integer, and is zero (0) when there are no elements in the array:
import numpy as np
a = np.array([])
if a.size == 0:
# Do something when `a` is empty
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Changing the interval of SetInterval while it's running
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I assume that is what he meant. I just tried that and it seems to be working. Thanks, guys!
– Joe Di Stefano
Aug 14 '09 at 21:32
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How to change height of grouped UITableView header?
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If you use tableView style grouped, tableView automatically set top and bottom insets. To avoid them and avoid internal insets setting, use delegate methods for header and footer. Never return 0.0 but CGFLOAT_MIN.
Objective-C
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSe...
Recompile Heroku slug without push or config change
...is a way to force Heroku to recompile the slug without pushing new commits and/or updating the config variables.
9 Answers
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Check empty string in Swift?
...print("Nothing to see here")
}
Apple Pre-release documentation: "Strings and Characters".
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Measuring function execution time in R
Is there a standardized way in R of measuring execution time of function?
10 Answers
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What is C# analog of C++ std::pair?
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Tuples are available since .NET4.0 and support generics:
Tuple<string, int> t = new Tuple<string, int>("Hello", 4);
In previous versions you can use System.Collections.Generic.KeyValuePair<K, V> or a solution like the following:
public ...
What is jQuery Unobtrusive Validation?
...s. I know the jQuery Unobtrusive Validation library was made by Microsoft and is included in the ASP.NET MVC framework. But I cannot find a single online source that explains what it is. What is the difference between the standard jQuery Validation library and the "unobtrusive" version?
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How to check if a String contains any of some strings
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Simple and obvious solution. But is there any good ready to use implementation that not require multiple iterations through haystack string? I can implement it by myself, iterating through haystack string characters and comparing fi...