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How to set JAVA_HOME in Linux for all users
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edited May 23 '18 at 19:41
Robin Green
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How do I enable EF migrations for multiple contexts to separate databases?
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ckalckal
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Insert into … values ( SELECT … FROM … )
...SERT from another table I did the following in SQLite3:
INSERT INTO column_1 ( val_1, val_from_other_table )
VALUES('val_1', (SELECT val_2 FROM table_2 WHERE val_2 = something))
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Java regex email
...ror.
– Isuru Madusanka
Mar 8 '13 at 19:37
1
Thanks Isuru! I remember I was using this regex on on...
ASP.NET MVC Razor pass model to layout
... updates.
– Softlion
Mar 5 '12 at 9:19
4
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Is it possible to use “/” in a filename?
... e2fsck :p
– flarn2006
Dec 5 '18 at 19:56
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Declare and Initialize String Array in VBA
...it"). Variants - yuck!
– Andez
Sep 19 '14 at 10:03
31
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select、poll、epoll之间的区别总结[整理] - C/C++ - 清泛网 - 专注C/C++及内核技术
...1、select实现
select的调用过程如下所示：
（1）使用copy_from_user从用户空间拷贝fd_set到内核空间
（2）注册回调函数__pollwait
（3）遍历所有fd，调用其对应的poll方法（对于socket，这个poll方法是sock_poll，sock_poll根据情况会调用到...
List comprehension: Returning two (or more) items for each item
...bda x: x + 2
>>> g = lambda x: x ** 2
>>> list(chain.from_iterable((f(x), g(x)) for x in range(3)))
[2, 0, 3, 1, 4, 4]
Timings:
from timeit import timeit
f = lambda x: x + 2
g = lambda x: x ** 2
def fg(x):
yield f(x)
yield g(x)
print timeit(stmt='list(chain.from_itera...
Log all requests from the python-requests module
...:header: Connection: keep-alive
DEBUG:http.client:header: Server: gunicorn/19.9.0
DEBUG:http.client:header: Access-Control-Allow-Origin: *
DEBUG:http.client:header: Access-Control-Allow-Credentials: true
DEBUG:urllib3.connectionpool:http://httpbin.org:80 "GET /get?foo=bar&baz=python HTTP/1.1" 20...