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Tricks to manage the available memory in an R session
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That's a good technique. When files are run in a certain order like that, I often prefix them with a number: 1-load.r, 2-explore.r, 3-model.r - that way it's obvious to others that there is some order present.
– hadley
Sep 4 '09 at 13:02
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Security of REST authentication schemes
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What's the difference between “groups” and “captures” in .NET regular expressions?
...t before looking into this that Captures would be an array of the captures ordered by the group they belong to. Rather it is just an alias to the groups[0].Captures. Pretty useless..
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What is the difference between a HashMap and a TreeMap? [duplicate]
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TreeMap is an example of a SortedMap, which means that the order of the keys can be sorted, and when iterating over the keys, you can expect that they will be in order.
HashMap on the other hand, makes no such guarantee. Therefore, when iterating over the keys of a HashMap, you can...
Debug vs. Release performance
...olved that slows down the program. For this particular code, it was on the order of 0.2-0.3 seconds runtime on its own, and 30+ seconds when the debugger was attached.
Simple solution though, just remove the debug messages that was no longer needed.
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What's the Android ADB shell “dumpsys” tool and what are its benefits?
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iPhone Keyboard Covers UITextField
...ViewController instance from the UIWindow.rootViewController hierarchy. In order to properly uncover UITextField/UITextView on it, topMostViewController.view's frame needs to be adjusted.
Step3:- Calculated expected move distance of topMostViewController.view with respect to first responded UITextF...
Execute another jar in a Java program
... idea is that given access to a jar, how do you add it to the classpath in order to load classes out of it.
– Jherico
Aug 24 '09 at 4:35
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Static nested class in Java, why?
... compiler will implicitly prepend the arg sequence of every constructor in order to pass a reference of an instance of the enclosing class. Pretty simple.
– tonix
Mar 12 '15 at 6:55
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Best way to select random rows PostgreSQL
... select * from table where random() < 0.01;
EXPLAIN select * from table order by random() limit 1000;
A quick test on a large table1 shows, that the ORDER BY first sorts the complete table and then picks the first 1000 items. Sorting a large table not only reads that table but also involves rea...