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html5 - canvas element - Multiple layers
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@SCLeo you said "Performance killer. About ~10 times slower" is completely wrong. Depending on use cases using a single DOM canvas and rendering offscreen canvases to that is quicker than stacking canvas in DOM. The common mistake is benchmarking rendering calls, canvas ...
How do you display JavaScript datetime in 12 hour AM/PM format?
How do you display a JavaScript datetime object in the 12 hour format (AM/PM)?
25 Answers
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Specifying colClasses in the read.csv
...es options in the read.csv function in R. In my data, the first column "time" is basically a character vector while the rest of the columns are numeric.
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Unable to create a constant value of type Only primitive types or enumeration types are supported in
I am getting this error for the query below
6 Answers
6
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How efficient is locking an unlocked mutex? What is the cost of a mutex?
... mutex? I.e. how much assembler instructions are there likely and how much time do they take (in the case that the mutex is unlocked)?
The precise assembler instructions are the least overhead of a mutex - the memory/cache coherency guarantees are the main overhead. And less often a particular loc...
How do I pass parameters to a jar file at the time of execution?
How do I pass parameters to a JAR file at the time of execution?
5 Answers
5
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What do the return values of node.js process.memoryUsage() stand for?
From the official documentation ( source ):
4 Answers
4
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Hibernate Criteria returns children multiple times with FetchType.EAGER
...sults a regular sql join will return
So actually it should apear multiple times. this is explained very well by the author (Gavin King) himself here:
It both explains why, and how to still get distinct results
Also mentioned in the Hibernate FAQ :
Hibernate does not return distinct results f...
初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...ns: c2
flags: c3
cas_column: c4
expire_time_column: c5
unique_idx_name_on_key: PRIMARY
如上已经有了test数据库的demo_test表，通过c1查询c2的值，表结构如下所示：
mysql> DESC test.demo_test;
+-------+---------------------+------+-----+...
What to do about a 11000 lines C++ source file?
...(is 11000 lines huge?) mainmodule.cpp source file in our project and every time I have to touch it I cringe.
34 Answers
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