大约有 40,000 项符合查询结果（耗时：0.0378秒） [XML]
Iterate over the lines of a string
...our remarks at first because you listed the timing results in the opposite order of their implementation and numbering. =P
– jamesdlin
Oct 4 '17 at 22:59
|...
How to shrink/purge ibdata1 file in MySQL
...r server to use separate files for each table you need to change my.cnf in order to enable this:
[mysqld]
innodb_file_per_table=1
http://dev.mysql.com/doc/refman/5.5/en/innodb-multiple-tablespaces.html
As you want to reclaim the space from ibdata1 you actually have to delete the file:
Do a mys...
The split() method in Java does not work on a dot (.) [duplicate]
I have prepared a simple code snippet in order to separate the erroneous portion from my web application.
7 Answers
...
How to set up tmux so that it starts up with specified windows opened?
...ex windows, with the select-pane -t 1 where 1 is the number of the pane in order created starting with 0.
tmux new-session \; \
send-keys 'tail -f /var/log/monitor.log' C-m \; \
split-window -v \; \
split-window -h \; \
send-keys 'top' C-m \; \
select-pane -t 1 \; \
split-window -v \; \...
How to reset postgres' primary key sequence when it falls out of sync?
...
@Valery: But in order to avoid gaps mentioned by @mikl two comments above, you need SELECT setval('your_table_id_seq', coalesce((select max(id)+1 from your_table), 1), false);
– Antony Hatchkins
Nov 9 '...
What is the most efficient way of finding all the factors of a number in Python?
...his alteration may cause the function to take longer.
I ran some tests in order to check the speed. Below is the code used. To produce the different plots, I altered the X = range(1,100,1) accordingly.
import timeit
from math import sqrt
from matplotlib.pyplot import plot, legend, show
def factor...
Two versions of python on linux. how to make 2.7 the default
... break your package manager's ability to manage packages. And changing the order of directories in your PATH will affect a lot of other things besides Python. (In fact, it's more common to have /usr/local/bin ahead of /usr/bin, and it may be what you actually want—but if you have it the other way ...
How does Haskell printf work?
...(). For this, we have the instance
instance PrintfType (IO ())
Next, in order to support a variable number of arguments, we need to use recursion at the instance level. In particular we need an instance so that if r is a PrintfType, a function type x -> r is also a PrintfType.
-- instance Pri...
UTF-8, UTF-16, and UTF-32
...aracter, primarily. UTF-8 will start to use 3 or more bytes for the higher order characters where UTF-16 remains at just 2 bytes for most characters.
UTF-32 will cover all possible characters in 4 bytes. This makes it pretty bloated. I can't think of any advantage to using it.
...
How are GCC and g++ bootstrapped?
...in C++.
When you compile GCC or any other self-hosting compiler, the full order of building is:
Build new version of GCC with existing C compiler
re-build new version of GCC with the one you just built
(optional) repeat step 2 for verification purposes.
This process is called bootstrapping. It ...