大约有 47,000 项符合查询结果（耗时：0.0312秒） [XML]
Dictionaries and default values
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edited Jan 23 '19 at 5:30
Solomon Ucko
2,42022 gold badges1212 silver badges2727 bronze badges
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Get decimal portion of a number with JavaScript
I have float numbers like 3.2 and 1.6 .
22 Answers
22
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iterating over each character of a String in ruby 1.8.6 (each_char)
...e on each character separately from a base String in ruby. I am using ruby 1.8.6 and would like to do something like:
5 Ans...
Creating JS object with Object.create(null)?
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edited Feb 25 '19 at 4:31
Levi Roberts
1,12333 gold badges1818 silver badges4141 bronze badges
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Count with IF condition in MySQL query
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SELECT
ccc_news . * ,
SUM(if(ccc_news_comments.id = 'approved', 1, 0)) AS comments
FROM
ccc_news
LEFT JOIN
ccc_news_comments
ON
ccc_news_comments.news_id = ccc_news.news_id
WHERE
`ccc_news`.`category` = 'news_layer2'
AND `ccc_news`.`status` = 'Active'
G...
How dangerous is it to compare floating point values?
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11 Answers
11
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MySQL connection not working: 2002 No such file or directory
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answered Nov 4 '09 at 21:28
Alec GorgeAlec Gorge
15.3k99 gold badges5454 silver badges6969 bronze badges
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How do I declare and initialize an array in Java?
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For primitive types:
int[] myIntArray = new int[3];
int[] myIntArray = {1, 2, 3};
int[] myIntArray = new int[]{1, 2, 3};
// Since Java 8. Doc of IntStream: https://docs.oracle.com/javase/8/docs/api/java/util/stream/IntStream.html
int [] myIntArray = IntStream.range(0, 100).toArray(); // From 0 ...
Combining two Series into a DataFrame in pandas
I have two Series s1 and s2 with the same (non-consecutive) indices. How do I combine s1 and s2 to being two columns in a DataFrame and keep one of the indices as a third column?
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How to calculate date difference in JavaScript?
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18 Answers
18
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