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Django ModelForm: What is save(commit=False) used for?
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As a "real example", consider a user model where the email address and the username are always the same, and then you could overwrite your ModelForm's save method like:
class UserForm(forms.ModelForm):
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def save(self):
# Sets username to email before saving
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mfc里面的140种颜色宏 - C/C++ - 清泛网 - 专注C/C++及内核技术
...R_BLACK RGB( 0, 0, 0) // 纯黑
完整.h文件下载：ColorDef.zip
mfc 颜色宏
Determining 32 vs 64 bit in C++
..., but was curious to know if people could think of cases where this might fail or if there is a better way to do this. Please note we are trying to do this in a cross-platform, multiple compiler environment.
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Regular expression to match DNS hostname or IP Address?
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Here: stackoverflow.com/questions/4645126/… - I explain that names that start with a digit are considered as valid as well. Also, only one dot is questionable issue. Would be great to have more feedback on that.
– BreakPhreak
Jan 10 '11 a...
创业者只需要一种素质：成为某个领域的意见领袖 - 资讯 - 清泛网 - 专注C/C...
...传播
说了这么多推广的重要，那么作为普通创业者应该如何去做？我总不能像老罗一样包下一个剧场去做一个发布会吧。
普通人有普通人的方法，那就是一定要成为“意见领袖”，先看看百度百科上对意见领袖是这么定义的...
iOS开发调试技巧总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...复杂。这样就给我们新接手项目的开发者带来很多困扰。如何快速查看一个复杂UI的界面层次和布局，最快的方法就是用到视图调试。
当项目运行到某一个界面（可以是模拟器或真机）时，开启视图调试，点击按钮如图：
这样...
马化腾给创业者的3点建议：行业跨界领域最有机会诞生创新 - 资讯 - 清泛网 ...
...的一些基础设施提供这些服务。创业者要专注解决生活中如何提高效率，以及如果解决“痛点”，把精力聚焦在这一点，其它的东西可以利用平台来帮你。比如前不久我们组合的一个财团，收购了芬兰的最大的一间手机游戏公司...
What is the best way to do a substring in a batch file?
... - expands %I to a file extension only
%~sI - expanded path contains short names only
%~aI - expands %I to file attributes of file
%~tI - expands %I to date/time of file
%~zI - expands %I to size of file
%~$PATH:I - searches the directories listed in the PATH
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App Inventor 2 中的响应式设计 · App Inventor 2 中文网
...ng sizes as percentages
Fixed vs. responsive sizing
Detailed example
Special circumstances
Limitation: Drawing and animation
Responsive design and Google Play
One tricky issue in designing apps is making apps that look good on devices with scree...
Regular expression for first and last name
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Your regex fail on 2 characters string. I think this fixed it ^[\w'\-,.]*[^_!¡?÷?¿\/\\+=@#$%ˆ&*(){}|~<>;:[\]]*$
– TKA
Aug 8 '19 at 19:23
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