大约有 45,061 项符合查询结果（耗时：0.0318秒） [XML]
Is an empty href valid?
... string may be a URI reference.
HTML 4.01
HTML 4.01 uses RFC 2396, where it says in section 4.2. Same-document References (bold emphasis mine):
A URI reference that does not contain a URI is a reference to the current document. In other words, an empty URI reference within a document is inter...
What does the “__block” keyword mean?
What exactly does the __block keyword in Objective-C mean? I know it allows you to modify variables within blocks, but I'd like to know...
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Why is there no tuple comprehension in Python?
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edited Jun 18 '19 at 0:14
Tom Zych
11.9k99 gold badges3131 silver badges5151 bronze badges
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Reducing MongoDB database file size
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UPDATE: with the compact command and WiredTiger it looks like the extra disk space will actually be released to the OS.
UPDATE: as of v1.9+ there is a compact command.
This command will perform a compaction "in-line". It will stil...
Check if directory mounted with bash
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Running the mount command without arguments will tell you the current mounts. From a shell script, you can check for the mount point with grep and an if-statement:
if mount | grep /mnt/md0 > /dev/null; then
echo "yay"
else
echo "nay"
fi
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What is the difference between match_parent and fill_parent?
I'm a little confused about two XML properties: match_parent and fill_parent . It seems that both are the same. Is there any difference between them?
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Disable a Button
I want to disable a button ( UIButton ) on iOS after it is clicked. I am new to developing for iOS but I think the equivalent code on objective - C is this:
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Best place to insert the Google Analytics code [duplicate]
...code in WordPress, header or footer? I prefer footer, because I wanted my site to load faster by reducing the number of scripts in the header, but can it work even if the script is in the footer?
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Multiple HttpPost method in Web API controller
I am starting to use MVC4 Web API project, I have controller with multiple HttpPost methods. The Controller looks like the following:
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Using print statements only to debug
I have been coding a lot in Python of late. And I have been working with data that I haven't worked with before, using formulae never seen before and dealing with huge files. All this made me write a lot of print statements to verify if it's all going right and identify the points of failure. But, ...