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UITableView with fixed section headers
... is getting fixed in the middle of the screen, i want to scroll the header down, but when scrolling up i want it to fix on the first row.. can it be possible?
– Gorib Developer
Aug 2 '18 at 12:15
...
What would cause an algorithm to have O(log log n) complexity?
...g n) is for that algorithm to work by repeatedly cut the size of the input down by some constant factor on each iteration. If this is the case, the algorithm must terminate after O(log n) iterations, because after doing O(log n) divisions by a constant, the algorithm must shrink the problem size do...
Access to Modified Closure (2)
... 5 onwards, this has changed, and specifically in the case of foreach, you do not need to do this any more: the code in the question would work as expected.
To show this not working without this change, consider the following:
string[] names = { "Fred", "Barney", "Betty", "Wilma" };
using (Form fo...
Android buildscript repositories: jcenter VS mavencentral
...to get your package to Maven Central (for supporting legacy tools) you can do it from Bintray as well, in a click of a button or even automatically.
Regarding performance improvements, couple of android developer advocates had faced/noticed the issue of huge indexing with maven central.
In the wo...
Understanding the Rails Authenticity Token
... form to create, update, or destroy a resource, the Rails app creates a random authenticity_token, stores this token in the session, and places it in a hidden field in the form. When the user submits the form, Rails looks for the authenticity_token, compares it to the one stored in the session, and ...
base64 encoded images in email signatures
...ork reliably for most email clients. For email purposes be sure to read Shadow2531's answer.
Base-64 data is legal in an img tag and I believe your question is how to properly insert such an image tag.
You can use an online tool or a few lines of code to generate the base 64 string.
The syntax ...
Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant f
...
Your view controller may have the wrong class in your xib.
I downloaded your project.
The error you are getting is
'NSUnknownKeyException', reason: '[<UIViewController 0x3927310> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key string.'
...
AngularJS: Service vs provider vs factory
...this.$get = function(a) {
return new Greeter(a);
};
});
Then we can do this:
angular.module('abc', []).config(function(greeter2Provider) {
greeter2Provider.setSalutation('Halo');
});
function Controller(greeter2) {
expect(greeter2.greet()).toEqual('Halo 123');
}
As a side note, service,...
What's the best way to check if a file exists in C?
...f( access( fname, F_OK ) != -1 ) {
// file exists
} else {
// file doesn't exist
}
You can also use R_OK, W_OK, and X_OK in place of F_OK to check for read permission, write permission, and execute permission (respectively) rather than existence, and you can OR any of them together (i.e. c...
Swift - How to convert String to Double
...am in swift language.
And I got this problem: how to convert a String to a Double?
29 Answers
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