大约有 45,000 项符合查询结果（耗时：0.0919秒） [XML]
Query an XDocument for elements by name at any depth
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How would you tackle this if an element name was duplicated within an xml document? For example: If the xml contained a collection of <Cars> with sub elements of <Part>, and also a collection of <Planes> with sub elements of <Part...
My Understanding of HTTP Polling, Long Polling, HTTP Streaming and WebSockets
...d learned a lot from them. Some of the questions I read are related to specific implementation challenges while others focus on general concepts. I just want to make sure I understood all of the concepts and the reasoning why technology X was invented over technology Y and so on. So here goes:
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What is the difference between Serializable and Externalizable in Java?
What is the difference between Serializable and Externalizable in Java?
11 Answers
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is there a Java equivalent to null coalescing operator (??) in C#? [duplicate]
...(x != null) ? x : -1;
Of course, you can wrap this up in library methods if you feel the need to (it's unlikely to cut down on length much), but at the syntax level there isn't anything more succinct available.
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Read a file one line at a time in node.js?
...);
});
The last line is read correctly (as of Node v0.12 or later), even if there is no final \n.
UPDATE: this example has been added to Node's API official documentation.
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In which order do CSS stylesheets override?
....w3.org/TR/2011/REC-CSS2-20110607/cascade.html#cascade
In short: more specific rules override more general ones. Specificity is defined based on how many IDs, classes, and element names are involved, as well as whether the !important declaration was used. When multiple rules of the same "specificit...
Undo part of unstaged changes in git
... can use git checkout -p, which lets you choose individual hunks from the diff between your working copy and index to revert. Likewise, git add -p allows you to choose hunks to add to the index, and git reset -p allows you to choose individual hunks from the diff between the index and HEAD to back o...
SQLAlchemy: Creating vs. Reusing a Session
...ssion, except that its verbose and redundant, and I wanted to stop the proliferation of small-scale "helpers" that each approached the issue of this redundancy in some new and more confusing way.
So sessionmaker() is just a tool to help you create Session objects when you need them.
Next part. I...
Finding duplicate values in MySQL
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But how is this useful if you can't get the IDs of the rows with duplicate values? Yes, you can do a new query matching for each duplicate value, but is it possible to simply list the duplicates?
– NobleUplift
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How can I verify if a Windows Service is running
...rvice typically takes some time to start. I'd like to check, from my code, if the service is running. How can I accomplish this?
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