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How to find all combinations of coins when given some dollar value
I found a piece of code that I was writing for interview prep few months ago.
35 Answers
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How do I find the next commit in git? (child/children of ref)
...ng the other way in time, use something like
git log --reverse --ancestry-path 894e8b4e93d8f3^..master
where 894e8b4e93d8f3 is the first commit you want to show.
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Aborting a stash pop in Git
I popped a stash and there was a merge conflict. Unlike the question that is listed as a duplicate, I already had some uncommitted changes in the directory which I wanted to keep. I don't just want to make the merge conflict disappear, but also to get my directory back to the state it was before the...
When using Spring Security, what is the proper way to obtain current username (i.e. SecurityContext)
I have a Spring MVC web app which uses Spring Security. I want to know the username of the currently logged in user. I'm using the code snippet given below . Is this the accepted way?
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Building big, immutable objects without using constructors having long parameter lists
...e I run into that case I tend to create constructor abominations with long parameter lists.
9 Answers
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jQuery callback for multiple ajax calls
...to make three ajax calls in a click event. Each ajax call does a distinct operation and returns back data that is needed for a final callback. The calls themselves are not dependent on one another, they can all go at the same time, however I would like to have a final callback when all three are com...
Hidden Features of C++? [closed]
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Most C++ programmers are familiar with the ternary operator:
x = (y < 0) ? 10 : 20;
However, they don't realize that it can be used as an lvalue:
(a == 0 ? a : b) = 1;
which is shorthand for
if (a == 0)
a = 1;
else
b...
java.lang.IllegalArgumentException: View not attached to window manager
I have an activity that starts AsyncTask and shows progress dialog for the duration of operation. The activity is declared NOT be recreated by rotation or keyboard slide.
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Trust Store vs Key Store - creating with keytool
...ong with signed cert.
During the SSL handshake,
A client tries to access https://
And thus, Server responds by providing a SSL certificate (which is stored in its keyStore)
Now, the client receives the SSL certificate and verifies it via trustStore (i.e the client's trustStore already has pre-de...
How to check if a string contains a substring in Bash
...if [[ $string == *"My long"* ]]; then
echo "It's there!"
fi
Note that spaces in the needle string need to be placed between double quotes, and the * wildcards should be outside. Also note that a simple comparison operator is used (i.e. ==), not the regex operator =~.
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