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Convert data.frame column to a vector?
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Change MySQL default character set to UTF-8 in my.cnf?
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海量数据相似度计算之simhash短文本查找 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...。但是随着业务的增长 simhash的数据也会暴增，如果一天100w，10天就1000w了。我们如果插入一条数据就要去比较1000w次的simhash，计算量还是蛮大，普通PC 比较1000w次海明距离需要 300ms ，和5000w数据比较需要1.8 s。看起来相似度计算...
Get number of digits with JavaScript
...d like to know how many digits var number has. For example: If number = 15; my function should return 2 . Currently, it looks like this:
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How to nicely format floating numbers to String without unnecessary decimal 0?
...ng)d);
else
return String.format("%s",d);
}
Produces:
232
0.18
1237875192
4.58
0
1.2345
And does not rely on string manipulation.
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Python element-wise tuple operations like sum
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How does python numpy.where() work?
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answered Apr 12 '11 at 22:48
Joe KingtonJoe Kington
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Creating a simple XML file using python
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314
These days, the most popular (and very simple) option is the ElementTree API,
which has been in...
“for loop” with two variables? [duplicate]
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201
If you want the effect of a nested for loop, use:
import itertools
for i, j in itertools.produc...
Is there a better way to dynamically build an SQL WHERE clause than by using 1=1 at its beginning?
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Save the conditions in a list:
List<string> conditions = new List<string>();
if ...