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Is “else if” faster than “switch() case”? [duplicate]
...lookup table or a hash list. This means that all items get the same access time, compared to a list of if:s where the last item takes much more time to reach as it has to evaluate every previous condition first.
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How to rsync only a specific list of files?
...'s answer below is better. Please use that one!
You might have an easier time, if you're looking for a specific list of files, putting them directly on the command line instead:
# rsync -avP -e ssh `cat deploy/rsync_include.txt` root@0.0.0.0:/var/www/
This is assuming, however, that your list i...
What is console.log?
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Imho, better than checking every time if console.log is available is better to have something like this:if(typeof(console) == 'undefined') { console = {'log': function() {return}} } In such case you can write console.log every time you need without check...
How can I hash a password in Java?
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You can actually use a facility built in to the Java runtime to do this. The SunJCE in Java 6 supports PBKDF2, which is a good algorithm to use for password hashing.
byte[] salt = new byte[16];
random.nextBytes(salt);
KeySpec spec = new PBEKeySpec("password".toCharArray(), salt, ...
How to read a file into a variable in shell?
...und adding trailing characters is great, but after using it for quite some time I decided I needed a solution that didn't use command substitution at all.
My approach now uses read along with the printf builtin's -v flag in order to read the contents of stdin directly into a variable.
# Reads stdin ...
How do I create a Java string from the contents of a file?
I've been using the idiom below for some time now. And it seems to be the most wide-spread, at least on the sites I've visited.
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How to get year, month, day, hours, minutes, seconds and milliseconds of the current moment in Java?
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You can use the getters of java.time.LocalDateTime for that.
LocalDateTime now = LocalDateTime.now();
int year = now.getYear();
int month = now.getMonthValue();
int day = now.getDayOfMonth();
int hour = now.getHour();
int minute = now.getMinute();
int secon...
How to get a list of current open windows/process with Java?
... list from the command "ps -e":
try {
String line;
Process p = Runtime.getRuntime().exec("ps -e");
BufferedReader input =
new BufferedReader(new InputStreamReader(p.getInputStream()));
while ((line = input.readLine()) != null) {
System.out.println(line); //<--...
Determining the last changelist synced to in Perforce
... making the assumption that your whole workspace was synced to head at the time of your last changelist submission, and that changelist included all of your open files. It's too easy to be mistaken in those assumptions, hard to detect, and horribly expensive in terms of lost time. On the other hand,...
Why does SSL handshake give 'Could not generate DH keypair' exception?
...t my question is about using older version.. When I use older version, sometimes it works and sometimes it gives above exception..Why so random behaviour? If its a bug in java, then I guess it should never work?
– N..
Aug 26 '13 at 5:20
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