大约有 15,474 项符合查询结果（耗时：0.0322秒） [XML]
xpath find if node exists
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<xsl:if test="xpath-expression">...</xsl:if>
so for example
<xsl:if test="/html/body">body node exists</xsl:if>
<xsl:if test="not(/html/body)">body node missing</xsl:if>
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Is using a lot of static methods a bad thing?
...hod mutates global state, or proxies to a global object, or some other non-testable behavior. These are throwbacks to procedural programming and should be refactored if at all possible.
There are a few common uses of "unsafe" statics -- for example, in the Singleton pattern -- but be aware that de...
How do I clone a subdirectory only of a Git repository?
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git clone --filter from git 2.19 now works on GitHub (tested 2020-09-18, git 2.25.1)
This option was added together with an update to the remote protocol, and it truly prevents objects from being downloaded from the server.
E.g., to clone only objects required for d1 of this rep...
Should logger be private static or not
...er inside the class you are going to have a devil of a time with your unit tests. You are writing unit tests aren't you?
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How to “test” NoneType in python?
... None in it or not.
Quoting from is docs,
The operators is and is not test for object identity: x is y is true if and only if x and y are the same object. x is not y yields the inverse truth value.
Since there can be only one instance of None, is would be the preferred way to check None.
H...
Check if a JavaScript string is a URL
...ring
'(\\#[-a-z\\d_]*)?$','i'); // fragment locator
return !!pattern.test(str);
}
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Auto-fit TextView for Android
... happy Auto Scale TextView Text to Fit within Bounds
I have modified your test case:
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ViewGroup container = (ViewGroup) findViewById(R.i...
What are some examples of commonly used practices for naming git branches? [closed]
...nge. I do not know what your cycles are, but let's assume they are 'new', 'testing' and 'verified'. You can name your branches with abbreviated versions of these tags, always spelled the same way, to both group them and to remind you which stage you're in.
new/frabnotz
new/foo
new/bar
test/foo
tes...
Checking for empty arrays: count vs empty
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@Jacco: Im not disputing that. But if youre testing it its empty, i dont see what relevance that has - its a question with a boolean result which is what the function will return. In regards to what is considered empty in dont see how those criteria would produce the w...
What's the fastest way to merge/join data.frames in R?
... the precise computation can make a huge difference on which package is fastest. For example, we do a merge and an aggregate below. We see that the results are nearly reversed for the two. In the first example from fastest to slowest we get: data.table, plyr, merge and sqldf whereas in the second...