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How do I get the currently displayed fragment?
...t the currently displayed Fragment instance, not iteratively check through all fragments and then decide which fragment is now displayed on the screen. I think your answer needs my code to iteratively check each of my fragments, and find out the visible one ...
– Leem.fin
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What does the red exclamation point icon in Eclipse mean?
...Build path"
Then select "Configure Build Path"
Click on "Libraries"
Remove all the libraries which were referring to old path
Then, the exclamation symbol on the "Project name" was removed.
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How do I add indices to MySQL tables?
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ALTER TABLE `table` ADD INDEX `product_id_index` (`product_id`)
Never compare integer to strings in MySQL. If id is int, remove the quotes.
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Encoding as Base64 in Java
... Base64.getEncoder().encodeToString(string.getBytes(StandardCharsets.UTF_8))
Here is a short, self-contained complete example:
import java.nio.charset.StandardCharsets;
import java.util.Base64;
public class Temp {
public static void main(String... args) throws Exception {
final Str...
Drop multiple tables in one shot in mysql
...e A has two children B and C. Then we can use the following syntax to drop all tables.
DROP TABLE IF EXISTS B,C,A;
This can be placed in the beginning of the script instead of individually dropping each table.
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Why does MYSQL higher LIMIT offset slow the query down?
...e improvement. If there is no index usable by ORDER BY or the index covers all fields you need, you don't need this workaround.
– Quassnoi
Nov 24 '11 at 18:13
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What is sr-only in Bootstrap 3?
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I don't think it's confusing at all, it clearly says the class is used for information to be hidden, that is only meant to be seen by screen readers.
– Lee
Sep 8 '16 at 14:24
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Does .NET have a way to check if List a contains all items in List b?
...s easy:
public class ListHelper<T>
{
public static bool ContainsAllItems(List<T> a, List<T> b)
{
return !b.Except(a).Any();
}
}
This checks whether there are any elements in b which aren't in a - and then inverts the result.
Note that it would be slightly mo...
Should I use char** argv or char* argv[]?
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As you are just learning C, I recommend you to really try to understand the differences between arrays and pointers first instead of the common things.
In the area of parameters and arrays, there are a few confusing rules that should be clear before going on. First, what ...
How to implement has_many :through relationships with Mongoid and mongodb?
...uire multiple queries.
https://github.com/mongoid/mongoid/issues/544
Normally if you have a many-many relationship in a RDBMS you would model that differently in MongoDB using a field containing an array of 'foreign' keys on either side. For example:
class Physician
include Mongoid::Document
...