大约有 4,700 项符合查询结果（耗时：0.0269秒） [XML]
Formatting NSDate into particular styles for both year, month, day, and hour, minute, seconds
...bleView for instance.
To give an idea, looping over 1000 dates took me 0.5 sec using the above toString(template: String) function, compared to 0.05 sec using myFormatter.string(from: Date).
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How to sort a list/tuple of lists/tuples by the element at a given index?
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sorted_by_second = sorted(data, key=lambda tup: tup[1])
or:
data.sort(key=lambda tup: tup[1]) # sorts in place
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Is the primary key automatically indexed in MySQL?
...e test(id int primary key, s varchar(20));
Query OK, 0 rows affected (0.06 sec)
mysql> show indexes from test \G
*************************** 1. row ***************************
Table: test
Non_unique: 0
Key_name: PRIMARY
Seq_in_index: 1
Column_name: id
Collation: A
Cardin...
Find out time it took for a python script to complete execution
... time python myScript.py for windows The out put will be Execution time in seconds: 38.509970903396606 real 0m38.792s user 0m0.015s sys 0m0.046s
– Aryashree Pritikrishna
Jun 30 at 14:47
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Why do some C# lambda expressions compile to static methods?
...iables, its lifetime extends to the lifetime of those other variables (see sec. L.1.7, Local variables, and sec. N.15.5.1, Captured outer variables, in the C# 5.0 specification).
Note that the C# specification only talks about anonymous methods being converted to "expression trees", not "anonymous ...
Explicit vs implicit SQL joins
...------+------+---------+--------------+------+-------+
2 rows in set (0.02 sec)
mysql> explain select * from table1 a, table2 b where a.pid = b.pid;
+----+-------------+-------+------+---------------+------+---------+--------------+------+-------+
| id | select_type | table | type | possible_key...
How to extract the year from a Python datetime object?
...thon versions (2.5.x tree I think). So you will find things like hour/min/sec on some 64-bit platforms, while you get hour/minute/second on 32-bit.
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Get names of all keys in the collection
... in a subdocument, just modify this line: for (var key in this.first_level.second_level.nth_level) { emit(key, null); }
– dtbarne
Jan 7 '16 at 22:51
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How to check if a line is blank using regex
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excellent the codes now executes from 1.6sec to >1sec Thank you.
– Adnan
Jun 10 '10 at 8:57
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dd: How to calculate optimal blocksize? [closed]
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I've run the second script, testing read performance, on a 2015 rMBP with 512G SSD. The best block size was 8388608 : 3.582 GB bytes/sec.
– Quinn Comendant
Mar 1 '16 at 16:19
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