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C# Xml中SelectSingleNode方法中的xpath用法（Xml节点操作最佳方式） - 更...
...s("../Department)
objNode = objNode.SelectNode("Employees/Employee")
2.3 查询已知元素名的节点（集）
在使用不规则的层次文档时，由于不知道中间层次的元素名，可使用//符号来越过中间的节点，查询其子，孙或多层次下的其他所有元素。...
C# Xml中SelectSingleNode方法中的xpath用法（Xml节点操作最佳方式） - 更...
...s("../Department)
objNode = objNode.SelectNode("Employees/Employee")
2.3 查询已知元素名的节点（集）
在使用不规则的层次文档时，由于不知道中间层次的元素名，可使用//符号来越过中间的节点，查询其子，孙或多层次下的其他所有元素。...
C# Xml中SelectSingleNode方法中的xpath用法（Xml节点操作最佳方式） - 更...
...s("../Department)
objNode = objNode.SelectNode("Employees/Employee")
2.3 查询已知元素名的节点（集）
在使用不规则的层次文档时，由于不知道中间层次的元素名，可使用//符号来越过中间的节点，查询其子，孙或多层次下的其他所有元素。...
How to get a key in a JavaScript object by its value?
... |
edited Mar 22 '19 at 13:03
jithinkmatthew
57455 silver badges1515 bronze badges
answered Jan 28 '15 ...
How to evaluate a math expression given in string form?
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379
With JDK1.6, you can use the built-in Javascript engine.
import javax.script.ScriptEngineMana...
When does invoking a member function on a null instance result in undefined behavior?
...stand is why it's undefined behavior to dereference a null pointer. In C++03, there's actually a bit of ambiguity here.
Although "dereferencing a null pointer results in undefined behavior" is mentioned in notes in both §1.9/4 and §8.3.2/4, it's never explicitly stated. (Notes are non-normative.)...
How do I get current date/time on the Windows command line in a suitable format for usage in a file/
...ssue with using date . See @npocmaka's https://stackoverflow.com/a/19799236/8479
28 Answers
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How do I reverse a C++ vector?
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Luc Touraille
70.3k1313 gold badges8181 silver badges134134 bronze badges
answered Jan 16 '12 at 8:46
Ivaylo Strandjev...
Revert the `--no-site-packages` option with virtualenv
...nvironment.
Where venv is the name of your virtual environment, and python3.4 corresponds to whichever version of python involved, for example:
$ rm venv/lib/python3.4/no-global-site-packages.txt
And if you change your mind and want to put it back:
$ touch venv/lib/python3.4/no-global-site-pack...
Should I put #! (shebang) in Python scripts, and what form should it take?
...owever, which shebang line you use IS important.
Correct usage for Python 3 scripts is:
#!/usr/bin/env python3
This defaults to version 3.latest. For Python 2.7.latest use python2 in place of python3.
The following should NOT be used (except for the rare case that you are writing code which i...