大约有 44,000 项符合查询结果（耗时：0.0807秒） [XML]
Select random lines from a file
...lines_78000000000.txt
This gives me a a file with 78 Billion newlines ;-)
Now for the shuf part:
$ time shuf -n 10 lines_78000000000.txt
shuf -n 10 lines_78000000000.txt 2171.20s user 22.17s system 99% cpu 36:35.80 total
The bottleneck was CPU and not using multiple threads, it pinned ...
How can I override inline styles with external CSS?
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i know but the same i am saying !important will only increase the score for specific property, he may be using other properties (not for overriding) in the some block
– Rohit Agrawal
May 29...
Using Transactions or SaveChanges(false) and AcceptAllChanges()?
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This is no longer possible in EF 6.1. Do you know what kind of adjustments need to be made to work now?
– Alex Dresko
Jul 24 '14 at 22:44
add a co...
How do I do a multi-line string in node.js?
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Node 4.0+ now supports multiline strings intrinsically.
– Rob Raisch
Jan 3 '16 at 2:59
add a comment
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Why is creating a Thread said to be expensive?
... executed within the JVM thread in the OS. They are not often used, to my knowledge.
The biggest factor I can think of in the thread-creation overhead, is the stack-size you have defined for your threads. Thread stack-size can be passed as a parameter when running the VM.
Other than that, thread ...
Throwing cats out of windows
...be self-explanatory:
If first cat is thrown from k-th floor and dies, we now have k - 1 floors to check (all below k) and m - 1 cats (a[k - 1][m - 1]).
If cat survives, there're n - k floors left (all floors above k) and still m cats.
The worst case of two should be chosen, hence max.
+ 1 comes...
Why do indexes in XPath start with 1 and not 0?
...veloped to provide a more pleasant interface for humans to read RSS feeds. Now, raw RSS and XML data are read almost exclusively with some sort of reader or graphical interface. XML is still in frequent (perhaps permanent) use across the web, but it is masked by fancy graphical user interfaces to pr...
Difference between local and global indexes in DynamoDB
...table types and how they work, below:
Hash Only
As you probably already know; a Hash-Key by itself must be unique as writing to a Hash-Key that already exists will overwrite the existing data.
Hash+Range
A Hash-Key + Range-Key allows you to have multiple Hash Keys that are the same, as long as t...
How to get existing fragments when using FragmentPagerAdapter
...o FragmentStatePagerAdapter.
If you're reading this you probably already know that FragmentPagerAdapter/FragmentStatePagerAdapter is meant to create Fragments for your ViewPager, but upon Activity recreation (whether from a device rotation or the system killing your App to regain memory) these Frag...
Is the size of C “int” 2 bytes or 4 bytes?
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I know it's equal to sizeof(int). The size of an int is really compiler dependent. Back in the day, when processors were 16 bit, an int was 2 bytes. Nowadays, it's most often 4 bytes on a 32-bit as well as 64-bit systems.
Stil...