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Should I put #! (shebang) in Python scripts, and what form should it take?
...line in any script determines the script's ability to be executed like a standalone executable without typing python beforehand in the terminal or when double clicking it in a file manager (when configured properly). It isn't necessary but generally put there so when someone sees the file opened in ...
Why does Dijkstra's algorithm use decrease-key?
...ueue small, thus keeping the total number of priority queue dequeues small and the cost of each priority queue balance low.
In an implementation of Dijkstra's algorithm that reinserts nodes into the priority queue with their new priorities, one node is added to the priority queue for each of the m ...
Javascript library for human-friendly relative date formatting [closed]
...braries available, but it is trivial to implement it yourself. Just use a handful of conditions.
Assume date is an instantiated Date object for the time you want to make a comparison against.
// Make a fuzzy time
var delta = Math.round((+new Date - date) / 1000);
var minute = 60,
hour = minut...
MySQL InnoDB not releasing disk space after deleting data rows from table
...the size of the ibdata1 file reduce after running the optimize table command.
7 Answers
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Understanding scala enumerations
I have to say I don't understand Scala enumeration classes. I can copy-paste the example from documentation, but I have no idea what is going on.
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Warn user before leaving web page with unsaved changes
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Short, wrong answer:
You can do this by handling the beforeunload event and returning a non-null string:
window.addEventListener("beforeunload", function (e) {
var confirmationMessage = 'It looks like you have been editing something. '
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Change date format in a Java string
...e. Read the java.text.SimpleDateFormat javadoc what the individual parts stands for. So stands for example M for months and m for minutes. Also, years exist of four digits yyyy, not five yyyyy. Look closer at the code snippets I posted here above.
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When should I use RequestFactory vs GWT-RPC?
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The big difference between GWT RPC and RequestFactory is that the RPC system is "RPC-by-concrete-type" while RequestFactory is "RPC-by-interface".
RPC is more convenient to get started with, because you write fewer lines of code and use the same class on both...
Center a position:fixed element
...a position: fixed; popup box centered to the screen with a dynamic width and height. I used margin: 5% auto; for this. Without position: fixed; it centers fine horizontally, but not vertically. After adding position: fixed; , it's even not centering horizontally.
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How do I move an existing window to a new tab?
Is there a way to take an existing window (split) and put it into a new tab?
4 Answers
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