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WPF OpenFileDialog with the MVVM pattern? [duplicate]
I just started learning the MVVM pattern for WPF. I hit a wall: what do you do when you need to show an OpenFileDialog ?
5...
Multiple Inheritance in PHP
...an way to go around the fact that PHP5 still doesn't support multiple inheritance. Here's the class hierarchy:
11 Answers
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Which $_SERVER variables are safe?
...ols and you need to be aware of where a value comes from and hence whether it can be trusted for a certain purpose. $_SERVER['HTTP_FOOBAR'] for example is entirely safe to store in a database, but I most certainly wouldn't eval it.
As such, let's divide those values into three categories:
Server c...
Python string class like StringBuilder in C#?
...follow
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edited Aug 24 '16 at 8:10
Ruud
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mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc… expects parameter 1 to
...ir respective query functions/methods. You need to test for that error condition and handle it accordingly.
mysql_* extension:
NOTE The mysql_ functions are deprecated and have been removed in php version 7.
Check $result before passing it to mysql_fetch_array. You'll find that it's false bec...
How to write iOS app purely in C
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Damn, it took me a while but I got it:
main.c:
#include <CoreFoundation/CoreFoundation.h>
#include <objc/runtime.h>
#include <objc/message.h>
// This is a hack. Because we are writing in C, we cannot out and i...
'id' is a bad variable name in Python
Why is it bad to name a variable id in Python?
9 Answers
9
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How to avoid .pyc files?
Can I run the python interpreter without generating the compiled .pyc files?
10 Answers
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Determine if 2 lists have the same elements, regardless of order? [duplicate]
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You can simply check whether the multisets with the elements of x and y are equal:
import collections
collections.Counter(x) == collections.Counter(y)
This requires the elements to be hashable; runtime will be in O(n), where n is the size of the lists.
If the eleme...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
...n Dec 29 20:12:02.953 [rsStart] replSet info you may need to run replSetInitiate -- rs.initiate() in the shell -- if that is not already done
5、初始化副本集
在三台机器上任意一台机器登陆mongodb
/data/mongodbtest/mongodb-linux-x86_64-2.4.8/bin/mongo
#使用admin数...