大约有 30,000 项符合查询结果（耗时：0.0557秒） [XML]
Linux command to list all available commands and aliases
... print all commands available without duplicated lines and sorted alphabetically.
– Fabián
Aug 15 '19 at 19:31
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How can I get the concatenation of two lists in Python without modifying either one? [duplicate]
...rings:
>>> sum(['123', '345', '567'], '')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: sum() can't sum strings [use ''.join(seq) instead]
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How to test my servlet using JUnit
...ockito to have the mock return the correct params, verify they were indeed called (optionally specify number of times), write the 'result' and verify it's correct.
import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
import java.io.*;
import javax.servlet.http.*;
import org.apache...
Common elements in two lists
...he code snippets, no, it doesn't. Changes get reflected in the list you're calling the method on.
– BalusC
May 9 '11 at 22:56
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Shell - Write variable contents to a file
I would like to copy the contents of a variable (here called var ) into a file.
6 Answers
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How to convert linq results to HashSet or HashedSet
...};
var resultSet = query.ToHashSet();
You can't do that with an explicit call to the HashSet<T> constructor. We're relying on type inference for generic methods to do it for us.
Now you could choose to name it ToSet and return ISet<T> - but I'd stick with ToHashSet and the concrete ty...
苦逼的年轻人和年薪百万的区别到底在哪里？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...o 团队。同类公司的码农都有值日任务，大约每两个月 on call一周——世界各地分公司及客户工程师解决不了的问题，打电话给值日生，他们必须 24 小时待命，即时解决。
微软哥 23 岁，单身独居，大年三十on call，我可怜他，叫...
What is the difference between atomic / volatile / synchronized?
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You are specifically asking about how they internally work, so here you are:
No synchronization
private int counter;
public int getNextUniqueIndex() {
return counter++;
}
It basically reads value from memory, increments it and puts ...
Create a “with” block on several context managers? [duplicate]
... same as normally using nested with, because A(), B(), and C() will all be called initially, before entering the context managers. This will not work correctly if one of these functions raises an exception.
contextlib.nested is deprecated in newer Python versions in favor of the above methods.
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Repeat string to certain length
...t that need to be // in Python 3? Or dropping the +1 and using an explicit call to a ceiling function would suffice. Also, a note: the string generated actually has an extra repetition when it divides evenly; the extra gets cut off by the splice. That confused me at first.
– jp...