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Changing MongoDB data store directory
Until now I have not been specifying a MongoDB data directory and have had only one 30 GB primary partition.
9 Answers
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What is the difference between CascadeType.REMOVE and orphanRemoval in JPA?
...s address;
:
}
DIFFERENCE:-
The difference between the two settings is in the response to
disconnecting a relationship. For example, such as when setting the
address field to null or to another Address object.
If orphanRemoval=true is specified the disconnected Address in...
Python subprocess/Popen with a modified environment
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To temporarily set an environment variable without having to copy the os.envrion object etc, I do this:
process = subprocess.Popen(['env', 'RSYNC_PASSWORD=foobar', 'rsync', \
'rsync://username@foobar.com::'], stdout=subprocess.PIPE)
...
Get unique values from a list in python [duplicate]
...rated by commas. You can get the unique values by converting the list to a set.
mylist = ['nowplaying', 'PBS', 'PBS', 'nowplaying', 'job', 'debate', 'thenandnow']
myset = set(mylist)
print(myset)
If you use it further as a list, you should convert it back to a list by doing:
mynewlist = list(mys...
Adding 'serial' to existing column in Postgres
...urn foo into bar
CREATE SEQUENCE foo_a_seq;
ALTER TABLE foo ALTER COLUMN a SET DEFAULT nextval('foo_a_seq');
ALTER TABLE foo ALTER COLUMN a SET NOT NULL;
ALTER SEQUENCE foo_a_seq OWNED BY foo.a; -- 8.2 or later
SELECT MAX(a) FROM foo;
SELECT setval('foo_a_seq', 5); -- replace 5 by SELECT MAX re...
Clean code to printf size_t in C++ (or: Nearest equivalent of C99's %z in C++)
I have some C++ code that prints a size_t :
9 Answers
9
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git + LaTeX workflow
...is text. I'm also thinking about putting another private repository on codaset, if my server for some reason is not accessible.
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Using pg_dump to only get insert statements from one table within database
...efore the -t if you only want the INSERTs, without the CREATE TABLE etc to set up the table in the first place.
version >= 8.4.0
pg_dump --column-inserts --data-only --table=<table> <database>
share
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TCPClient TCP客户端扩展：连接TCP服务器进行文本消息通信 · App Inventor 2 中文网
...，并通过 TCP 逐行交换文本消息。消息以行分隔符（CR、LF 或 CRLF）结束。
主要功能
连接到 TCP 服务器
支持双向文本消息传输
支持多种字符编码（US-ASCII、UTF-8、ISO-8859-1、UTF-16等）
支持行分隔符配置
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How do I use the lines of a file as arguments of a command?
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It's a kernel setting so you'd need to recompile the kernel. Or investigate the xargs command
– glenn jackman
Nov 24 '17 at 13:57
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