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Most efficient way to store thousand telephone numbers
...ups of 17 bits are the last five digits of each number stored in ascending order.
In total we're looking at 2128 bytes for the 1000 numbers, or 17.017 bits per 10-digit telephone number.
Search is O(log n) (binary search) and full enumeration is O(n).
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If unit testing is so great, why aren't more companies doing it? [closed]
...ests are green, the product works as intended (except for usability issues etc). My experience is that the total development time is almost not affected at all. You spend more time on things, and get them right the first time around rather than after time spent on bug fixing.
–...
How does database indexing work? [closed]
...stores values of indexed
column + pointer to the indexed row in a sorted order for efficient
look-ups.
Things are simple in schools, isn't it? :P
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What does the git index contain EXACTLY?
...ndex file has the following format
All binary numbers are in network byte order.
Version 2 is described here unless stated otherwise.
A 12-byte header consisting of:
4-byte signature:
The signature is { 'D', 'I', 'R', 'C' } (stands for "dircache")
4-byte version number:
The current supported ver...
What is reflection and why is it useful?
...is in Java (imagine the object in question is foo) :
Method method = foo.getClass().getMethod("doSomething", null);
method.invoke(foo, null);
One very common use case in Java is the usage with annotations. JUnit 4, for example, will use reflection to look through your classes for methods tagged w...
SSO with CAS or OAuth?
... 2.0 to create an authentication protocol, which is what Facebook/LinkedIn etc. have done; the only standardized extension of OAuth 2.0 that provides authentication is OpenID Connect, which is the designated successor of OpenID
– Hans Z.
Jan 3 '15 at 16:55
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C# int to byte[]
... trying to say that a signed integer is a normal 4-byte integer with bytes ordered in a big-endian way.
Now, you are most probably working on a little-endian machine and BitConverter.GetBytes() will give you the byte[] reversed. So you could try:
int intValue;
byte[] intBytes = BitConverter.GetByt...
Android REST client, Sample?
...file profile) {
//Use the profile to display it on screen, etc.
}
});
Profile newProfile = new Profile();
myApi.postUserProfile(newProfile, new PostCallback() {
@Override
public void onPost...
phantomjs not waiting for “full” page load
...rs. Useful for waiting
* on a server response or for a ui change (fadeIn, etc.) to occur.
*
* @param testFx javascript condition that evaluates to a boolean,
* it can be passed in as a string (e.g.: "1 == 1" or "$('#bar').is(':visible')" or
* as a callback function.
* @param onReady what to do...
How to return multiple values? [duplicate]
...es, then you can use Java's built-in container classes like Map, List, Set etc. Check the java.util package's JavaDoc for more details.
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