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Bad arguments to +：The operation + cannot accept the arguments:, [&qu...
原因是加号+前面是空字符串，不能有效地转换成数字，所以报错。
比如"123"这个字符串可以自动转数字，但是空文本不行。
文本要判断空，然后给数字 0。
同理，空文本不但不能转数字，也不能转列表、字典...
What is a servicebus and when do I need one?
...od what it is. They claim to be "The most popular open-source service bus for .net".
3 Answers
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How to stop and restart memcached server?
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This was the correct answer for me, running Ubuntu and memcached as a service. Without specificing service, it does not work.
– user658182
Aug 5 '12 at 14:08
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Java 8 Streams: multiple filters vs. complex condition
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The code that has to be executed for both alternatives is so similar that you can’t predict a result reliably. The underlying object structure might differ but that’s no challenge to the hotspot optimizer. So it depends on other surrounding conditions wh...
How can I plot with 2 different y-axes?
...e by Stephen Few (which concludes “I certainly cannot conclude, once and for all, that graphs with dual-scaled axes are never useful; only that I cannot think of a situation that warrants them in light of other, better solutions.”) Also see point #4 in this cartoon ...
If you are determined, t...
Sort an array in Java
...When using arrays,
int[] array = new int[10];
Random rand = new Random();
for (int i = 0; i < array.length; i++)
array[i] = rand.nextInt(100) + 1;
Arrays.sort(array);
System.out.println(Arrays.toString(array));
// in reverse order
for (int i = array.length - 1; i >= 0; i--)
System.out...
Why declare unicode by string in python?
... you're telling Python the source file you've saved is utf-8. The default for Python 2 is ASCII (for Python 3 it's utf-8). This just affects how the interpreter reads the characters in the file.
In general, it's probably not the best idea to embed high unicode characters into your file no matter ...
Vim 80 column layout concerns
...tch OverLength /\%81v.\+/
This highlights the background in a subtle red for text that goes over the 80 column limit (subtle in GUI mode, anyway - in terminal mode it's less so).
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improve t...
Reordering of commits
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The command you're looking for is git rebase, specifically the -i/--interactive option.
I'm going to assume you want to leave commit c on branch A, and that you really do mean you want to move the other commits to the other branches, rather than mergi...
Uninstall ReSharper 4.5
...Visual Studio 2008. Now I want to install ReSharper 5, but I can't do it before I uninstall ReSharper 4.5.
4 Answers
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