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Which timestamp type should I choose in a PostgreSQL database?
...TE TABLE my_tbl (
my_timestamp TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
CHECK(EXTRACT(TIMEZONE FROM my_timestamp) = '0')
);
test=> SET timezone = 'America/Los_Angeles';
SET
test=> INSERT INTO my_tbl (my_timestamp) VALUES (NOW());
ERROR: new row for relation "my_tbl" violates check...
How do I write a correct micro-benchmark in Java?
...2: Always run with -XX:+PrintCompilation, -verbose:gc, etc., so you can verify that the compiler and other parts of the JVM are not doing unexpected work during your timing phase.
Rule 2.1: Print messages at the beginning and end of timing and warmup phases, so you can verify that there is no outpu...
Git interactive rebase no commits to pick
...u have to rebase onto a particular commit.
With a non-interactive rebase, if you supply a direct ancestor of the current commit then you aren't changing anything; with an interactive rebase you can edit commits after the commit that you are rebasing onto, even if the commit is a direct ancestor of ...
Is 1.0 a valid output from std::generate_canonical?
... description of the output of the algorithm) when loss of precision occurs if the current IEEE754 rounding mode is anything other than round-to-negative-infinity (note that the default is round-to-nearest).
The 7549723rd output of mt19937 with your seed is 4294967257 (0xffffffd9u), which when round...
FAT32系统中长文件名的存储 - C/C++ - 清泛网 - 专注C/C++及内核技术
...)。
(4)、如果存在老OS或程序无法读取的字符，换以"_"
短文件格式的目录项。其参数意义见表14：
表14 FAT32短文件目录项32个字节的表示定义
字节偏移(16进制)
字节数
定义
0x0~0x7
8
文件名
0x8~0xA...
How can I split up a Git commit buried in history?
... tree.
Run git rebase --continue to proceed applying the commits after the now-split commit.
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Why do we check up to the square root of a prime number to determine if it is prime?
... is not a prime, it can be factored into two factors a and b:
n = a * b
Now a and b can't be both greater than the square root of n, since then the product a * b would be greater than sqrt(n) * sqrt(n) = n. So in any factorization of n, at least one of the factors must be smaller than the square ...
Feedback on using Google App Engine? [closed]
...t for creating apps which do not need lot of background processing.
Edit:
Now task queues can be used for running batch processing or scheduled tasks
Edit:
after working/creating a real application on GAE for a year, now my opnion is that unless you are making a application which needs to scale to...
How can I use jQuery in Greasemonkey scripts in Google Chrome?
...function might need to be jQuery.noConflict();
– slolife
Sep 9 '11 at 23:58
2
I have modified the...
Should I use an exception specifier in C++?
In C++, you can specify that a function may or may not throw an exception by using an exception specifier. For example:
14 ...