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Using numpy to build an array of all combinations of two arrays
...grid() provides a much faster implementation:
@pv's solution
In [113]:
%timeit cartesian(([1, 2, 3], [4, 5], [6, 7]))
10000 loops, best of 3: 135 µs per loop
In [114]:
cartesian(([1, 2, 3], [4, 5], [6, 7]))
Out[114]:
array([[1, 4, 6],
[1, 4, 7],
[1, 5, 6],
[1, 5, 7],
...
How do I use prepared statements in SQlite in Android?
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I use prepared statements in Android all the time, it's quite simple :
SQLiteDatabase db = dbHelper.getWritableDatabase();
SQLiteStatement stmt = db.compileStatement("INSERT INTO Country (code) VALUES (?)");
stmt.bindString(1, "US");
stmt.executeInsert();
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Storing Images in DB - Yea or Nay?
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In my experience, sometimes the simplest solution is to name the images according to the primary key. So it's easy to find the image that belongs to a particular record, and vice versa. But at the same time you're not storing anything about the im...
How to find unused/dead code in java projects [closed]
...k, which is a dynamic language and thus allows for code modification at runtime. We instrument all methods with a logging call and uninstall the logging code after a method has been logged for the first time, thus after some time no more performance penalties occur. Maybe a similar thing can be done...
Unable to show a Git tree in terminal
....com is blocked here at work :( I will see your picture in about one hour, time to get home.
– VonC
Jun 30 '09 at 16:00
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How can I maximize a split window?
...ork - also I think question is about maximizing window to work for a short time in that state and then later on return to previous state -- by closing all windows then you will have to use your session file or manually open all other windows to get back
– serup
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Random Number Between 2 Double Numbers
...lizing a new RNG with every call, if you call quick enough that the system time doesn't change between calls the RNG will get seeded with the exact same timestamp, and generate the same stream of random numbers.
share
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Scanning Java annotations at runtime [closed]
...s library doesn't work right under java 13 (maybe earlier, too). The first time it gets called it seems to be ok. subsequent instantiations and uses fail saying the search urls aren't configured.
– Evvo
Feb 8 at 23:17
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How to get a key in a JavaScript object by its value?
...l. This is not slow, it’s O(n) which is pretty much the best possible runtime.
– Ben Wainwright
Jan 10 at 18:36
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How to change column order in a table using sql query in sql server 2005?
...you make a "SELECT *". I'm a developer and do this kind of queries all the time. You can spare some time with a good pre-defined column order. From any other standpoint, of course, it has no sense: nothing should depend on the column order. By the way, there is an ORDINAL_POSITION column qhen you qu...