大约有 3,285 项符合查询结果（耗时：0.0120秒） [XML]
Is there StartsWith or Contains in t sql with variables?
...f indexes. For example, a query using colName LIKE 'prefix%' will be very fast when colName is indexed, but colName LIKE '%substring%' or colName LIKE '%suffix' will be slow because SQL Server does not create suffix-trees when indexing text. Similarly using LEFT with a column will also be slow beca...
Copy array by value
...llowing jsPerf tests actually show that var arr2 = arr1.slice() is just as fast as var arr2 = arr1.concat(); JSPerf: jsperf.com/copy-array-slice-vs-concat/5 and jsperf.com/copy-simple-array . The result of jsperf.com/array-copy/5 kind of surprised me to the point I am wondering if the test code is ...
How to do a batch insert in MySQL
... to do batch inserts" this answer is actually bulk insert. Bulk is usually faster, see this question
– Mike Demenok
Dec 17 '13 at 3:51
2
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Is 1.0 a valid output from std::generate_canonical?
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The problem is in mapping from the codomain of std::mt19937 (std::uint_fast32_t) to float; the algorithm described by the standard gives incorrect results (inconsistent with its description of the output of the algorithm) when loss of precision occurs if the current IEEE754 rounding mode is anyt...
int value under 10 convert to string two digit number
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The accepted answer is good and fast:
i.ToString("00")
or
i.ToString("000")
If you need more complexity, String.Format is worth a try:
var str1 = "";
var str2 = "";
for (int i = 1; i < 100; i++)
{
str1 = String.Format("{0:00}", i);
str2 =...
Sorting HashMap by values [duplicate]
... For example, sorting the colors that appear on an image. It has to be fast, because we can have max_int colors.
– Rafael Sanches
Sep 28 '13 at 11:12
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Scaling Node.js
...t for node.js. You should use redis as your datastore because it is insane fast :). There is even a c library for node when you use node_redis.
npm install hiredis redis
Hiredis is what gives you kickass performance because it compiles to C code inside node. Here are some benchmarks from redis wh...
git rebase fatal: Needed a single revision
...rigin works, as does git rebase origin in my git.git clone (in up-to-date, fast-forward, and true rebase case, including interactive).
– Cascabel
Jan 25 '11 at 21:37
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How can I use jQuery in Greasemonkey scripts in Google Chrome?
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}
But, For cross-browser scripts, why not take advantage of a nice, fast, local copy of jQuery, when you can?
The following works as a Chrome userscript and a Greasemonkey script, and it uses the nice local @require copy of jQuery, if the platform supports it.
// ==UserScript==
// @name ...
Random row selection in Pandas dataframe
... Someone in an other post mentioned that np.random.choice is twice as fast as random.sample
– Phani
Jul 7 '14 at 19:00
5
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