大约有 30,000 项符合查询结果(耗时:0.0440秒) [XML]
Convert floating point number to a certain precision, and then copy to string
...log post - talks about performance too
Here is a diagram of the execution times of the various tested methods (from last link above):
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Random record from MongoDB
... race conditions are valid, but for collections where neither matters (one-time server-side batch extract in a collection where records aren't deleted), this is vastly superior to the hacky (IMO) solution in the Mongo Cookbook.
– Michael Moussa
Sep 5 '12 at 16:...
Why is processing a sorted array slower than an unsorted array?
...ll restore performance because no pointer-dereference needs to occur at runtime to access tuple members.
Chris Sinclair notes in the comments that "for TotalCount around 10,000 or less, the sorted version does perform faster". This is because a small list fits entirely into the CPU cache. The memor...
sed error: “invalid reference \1 on `s' command's RHS”
I run several substitution commands as the core of a colorize script for maven .
One of the sed commands uses a regular expression which works find in the shell as discussed here . The current (not working) implementation can be found here .
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Converting string to title case
I have a string which contains words in a mixture of upper and lower case characters.
23 Answers
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How to loop over files in directory and change path and add suffix to filename
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This is still a timely warning. I thought I had created my script incorrectly, but I had my file extension lower case instead of upper case, it found no files, and returned the glob pattern. ugh.
– RufusVS
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Create Pandas DataFrame from a string
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Time to sort out which import: Should we use pandas.compat.StringIO or Python 2/3 StringIO?
– smci
May 11 '18 at 0:30
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What is the difference between a cer, pvk, and pfx file?
...st a string of "A-Za-z0-9+/" used to represent 0-63, 6 bits of binary at a time, in sequence, sometimes with 1 or 2 "=" characters at the very end when there are leftovers ("=" being "filler/junk/ignore/throw away" characters)
the header and footer is something like "-----BEGIN CERTIFICATE-----" and...
what is the unsigned datatype?
I've seen this unsigned "typeless" type used a couple of times, but never seen an explanation for it. I suppose there's a corresponding signed type. Here's an example:
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How to remove leading and trailing zeros in a string? Python
I have several alphanumeric strings like these
6 Answers
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