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What does “Git push non-fast-forward updates were rejected” mean?
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137
GitHub has a nice section called "Dealing with “non-fast-forward” errors"
This error c...
const vs constexpr on variables
...ename them so that we can talk about them more easily:
const double PI1 = 3.141592653589793;
constexpr double PI2 = 3.141592653589793;
Both PI1 and PI2 are constant, meaning you can not modify them. However only PI2 is a compile-time constant. It shall be initialized at compile time. PI1 m...
Set value to null in WPF binding
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I am using .NET 3.5 SP1 so it's very simple:
<TextBox Text="{Binding Price, TargetNullValue=''}"/>
Which stands for (thanks Gregor for your comment):
<TextBox Text="{Binding Price, TargetNullValue={x:Static sys:String.Empty}}"/>
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e.printStackTrace equivalent in python
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291
import traceback
traceback.print_exc()
When doing this inside an except ...: block it will aut...
What's the difference between Sender, From and Return-Path?
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174
So, over SMTP when a message is submitted, the SMTP envelope (sender, recipients, etc.) is dif...
Difference between a Postback and a Callback
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edited Feb 23 '19 at 2:00
Glorfindel
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How does “do something OR DIE()” work in PHP?
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134
If the first statement returns true, then the entire statement must be true therefore the seco...
mysql - how many columns is too many?
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144
It's considered too many once it's above the maximum limit supported by the database.
The fac...
CSS Background Opacity [duplicate]
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1179
Children inherit opacity. It'd be weird and inconvenient if they didn't.
You can use a trans...
C++ const map element access
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126
at() is a new method for std::map in C++11.
Rather than insert a new default constructed elem...