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Better way to check if a Path is a File or a Directory?
... @KeyMs92 Its bitwise math. Basically, attr is some binary value with one bit meaning "this is a directory". The bitwise and & operator will return a binary value where only the bits that are on (1) in both the operands are turned on. In this case doing a bitwise and operation against att...
What does bundle exec rake mean?
...dler command to execute a script in the context of the current bundle (the one from your directory's Gemfile). rake db:migrate is the script where db is the namespace and migrate is the task name defined.
So bundle exec rake db:migrate executes the rake script with the command db:migrate in the con...
How should I validate an e-mail address?
...L_ADDRESS.matcher(target).matches();
}
}
Patterns viewable source
OR
One line solution from @AdamvandenHoven:
public final static boolean isValidEmail(CharSequence target) {
return !TextUtils.isEmpty(target) && android.util.Patterns.EMAIL_ADDRESS.matcher(target).matches();
}
...
How do I use .toLocaleTimeString() without displaying seconds?
... allowed options (it's based on a separate constructor but the options map one-to-one): developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…
– Brian Peterson
Mar 11 at 18:42
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Using Java 8 to convert a list of objects into a string obtained from the toString() method
...
One simple way is to append your list items in a StringBuilder
List<Integer> list = new ArrayList<>();
list.add(1);
list.add(2);
list.add(3);
StringBuilder b = new StringBuilder();
list.forEac...
Lambda function in list comprehensions
...
The first one creates a single lambda function and calls it ten times.
The second one doesn't call the function. It creates 10 different lambda functions. It puts all of those in a list. To make it equivalent to the first you need:
[(l...
Parsing a comma-delimited std::string [duplicate]
...
Input one number at a time, and check whether the following character is ,. If so, discard it.
#include <vector>
#include <string>
#include <sstream>
#include <iostream>
int main()
{
std::string str =...
Mockito. Verify method arguments
...
You could use the build in ReflectionEquals class for that purposes.
– takacsot
Apr 16 '14 at 6:23
2
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Grab a segment of an array in Java without creating a new array on heap
...to have to create a new byte array in the heap memory just to do that.
(Honestly, I feel my answer is worthy of deletion. The answer by @unique72 is correct. Imma let this edit sit for a bit and then I shall delete this answer.)
I don't know of a way to do this directly with arrays without add...
Can I disable a CSS :hover effect via JavaScript?
...an my solution also! I'm not sure why I didn't notice the elegance of this one before...
– Josh
May 5 '10 at 21:29
...