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How to use a decimal range() step value?
...btain). linspace takes a number of points to return, and also lets you specify whether or not to include the right endpoint:
>>> np.linspace(0,1,11)
array([ 0. , 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1. ])
>>> np.linspace(0,1,10,endpoint=False)
array([ 0. , 0.1, ...
What is the Swift equivalent to Objective-C's “@synchronized”?
I've searched the Swift book, but can't find the Swift version of @synchronized. How do I do mutual exclusion in Swift?
21 ...
How can prepared statements protect from SQL injection attacks?
...t exactly true. MySQL has supported prepared statements for quite a while now. The PDO driver has as well. But yet, MySQL queries were still prepared by PDO by default, last time i checked.
– cHao
Aug 18 '13 at 9:32
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Clojure: reduce vs. apply
I understand the conceptual difference between reduce and apply :
9 Answers
9
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c++ Timer使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...age(&msg,NULL,NULL,NULL)) && (itemp!=0) && (-1 != itemp) )
{
if (msg.message == WM_TIMER)
{
std::cout << "i got the message " << std::endl;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
}
多线程使用Timer：
#include <stdafx.h>
#inc...
SQL Server 2008 can't login with newly created user
...
I think it's good because it lets potential responders know that the problem is resolved. It also contributes to a growing body of documentation that other developers can use to find their own answers in the future.
– Joe Mayo
Nov 13 '09 at ...
How do I check two or more conditions in one ?
How do I check two conditions in one <c:if> ? I tried this, but it raises an error:
4 Answers
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About catching ANY exception
...with exceptions and tracking them all down can be a very painful task, and if you miss just one, you have a very very huge painful bug in your system. That being said, it's good to track down as many as you can and handle them appropriately and then have a backup catch all for the ones you miss.
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Copy a table from one database to another in Postgres
...get database:
pg_dump -t table_to_copy source_db | psql target_db
Note: If the other database already has the table set up, you should use the -a flag to import data only, else you may see weird errors like "Out of memory":
pg_dump -a -t my_table my_db | psql target_db
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How do I associate a Vagrant project directory with an existing VirtualBox VM?
... your "Vagrantfile" to track the UUID of your VM. This file will not exist if a VM does not exist. The format of the file is JSON. It looks like this if a single VM exists:
{
"active":{
"default":"02f8b71c-75c6-4f33-a161-0f46a0665ab6"
}
}
default is the name of the default virtual mac...