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What is the significance of initializing direction arrays below with given values when developing ch
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This is a technique to encode all directions as arrays - every pair of di[i],dj[i] is a different direction.
If we imagine we have a piece at a location x,y, and we want to add onto its x and its y value to move it to a nearby location, 1,0 is east, -1,0...
What's the difference between “groups” and “captures” in .NET regular expressions?
...hat
each Group object contains a
collection of Captures representing
all the intermediary matches by the
group during the match, as well as the
final text matched by the group.
And a few pages later, this is his conclusion:
After getting past the .NET
documentation and actually
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'innerText' works in IE, but not in Firefox
...current beta release, and has been in aurora for a while. What this practically means is you can start developing sites using innerText only and expect it to work (with possible quirks) on all current browsers in the near future, and old-IE too.
– Bob
Feb 22 '1...
SQL: IF clause within WHERE clause
...n a WHERE clause. If you want to apply some "IF" logic in the WHERE clause all you need to do is add the extra condition with an boolean AND to the section where it needs to be applied.
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impr...
phantomjs not waiting for “full” page load
...der, as per the regular rasterize.js example, but with a longer timeout to allow the JavaScript to finish loading additional resources:
page.open(address, function (status) {
if (status !== 'success') {
console.log('Unable to load the address!');
phantom.exit();
} else {
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Filter by process/PID in Wireshark
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I don't see how. The PID doesn't make it onto the wire (generally speaking), plus Wireshark allows you to look at what's on the wire - potentially all machines which are communicating over the wire. Process IDs aren't unique across different machines, anyway.
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Rails create or update magic?
I have a class called CachedObject that stores generic serialised objects indexed by key. I want this class to implement a create_or_update method. If an object is found it will update it, otherwise it will create a new one.
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“rm -rf” equivalent for Windows?
...MDIR [/S] [/Q] [drive:]path
RD [/S] [/Q] [drive:]path
/S Removes all directories and files in the specified directory in addition to the directory itself. Used to remove a directory tree.
/Q Quiet mode, do not ask if ok to remove a directory tree with /S
If you are using PowerShell ...
CSS force image resize and keep aspect ratio
...ht:95px;
width: auto;
height: auto;
}
<p>This image is originally 400x400 pixels, but should get resized by the CSS:</p>
<img width="400" height="400" src="http://i.stack.imgur.com/aEEkn.png">
This will make image shrink if it's too big for specified area (as downsi...
Hibernate, @SequenceGenerator and allocationSize
We all know the default behaviour of Hibernate when using @SequenceGenerator - it increases real database sequence by one , multiple this value by 50 (default allocationSize value) - and then uses this value as entity ID.
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