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Difference between / and /* in servlet mapping url pattern

... <url-pattern>/*</url-pattern> The /* on a servlet overrides all other servlets, including all servlets provided by the servletcontainer such as the default servlet and the JSP servlet. Whatever request you fire, it will end up in that servlet. This is thus a bad URL pattern for servle...
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Java - get pixel array from image

... is to be able to address pixel (x, y) from the image using int[x][y] . All the methods I have found do not do this (most of them return int[] s). ...
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How to implement classic sorting algorithms in modern C++?

... transparent comparators of the form std::less<> that act polymorphically on their arguments. This avoids having to provide an iterator's type. This can be used in combination with C++11's default function template arguments to create a single overload for sorting algorithms that take < as ...
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How to see query history in SQL Server Management Studio

...tary format. However if you need to see queries that were executed historically (except SELECT) this is the only way. You can use third party tools for this such as ApexSQL Log and SQL Log Rescue (free but SQL 2000 only). Check out this thread for more details here SQL Server Transaction Log Explo...
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Is there any advantage of using map over unordered_map in case of trivial keys?

... unordered_map. Something else to keep in mind is that unordered_map generally uses more memory. map just has a few house-keeping pointers, and memory for each object. Contrarily, unordered_map has a big array (these can get quite big in some implementations), and then additional memory for each ob...
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What is the difference between SAX and DOM?

... +1 - to clarify: use a DOM parser with smaller files that fit in RAM. Use a SAX parser for large files that wont. – Richard H Jul 26 '11 at 10:46 ...
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Fling gesture detection on grid layout

...vent e) { return true; } } } Attach your gesture listener to all the views you add to the main layout; // Do this for each view added to the grid imageView.setOnClickListener(SelectFilterActivity.this); imageView.setOnTouchListener(gestureListener); Watch in awe as your overridden ...
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Best way to define error codes/strings in Java?

...re's certainly a better implementation of the enum solution (which is generally quite nice): public enum Error { DATABASE(0, "A database error has occurred."), DUPLICATE_USER(1, "This user already exists."); private final int code; private final String description; private Error(int code...
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How to print a number with commas as thousands separators in JavaScript

... console.log(`${failures} test(s) failed`); } else { console.log("All tests passed"); } .as-console-wrapper { max-height: 100% !important; } The regex uses 2 lookahead assertions: a positive one to look for any point in the string that has a multiple of 3 digits in a row...
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How can I deploy/push only a subdirectory of my git repo to Heroku?

... Yep, but subtree is still (as of 1.8.0.2) not included via the git installer. Luckily installing from source is quick and straightforward, this page worked for me on mac. – dribnet Dec 29 '12 at 22:19 ...