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Django - how to create a file and save it to a model's FileField?
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edited Apr 3 '18 at 12:20
pawas kr. singh
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answered ...
Using Linq to get the last N elements of a collection?
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collection.Skip(Math.Max(0, collection.Count() - N));
This approach preserves item order without a dependency on any sorting, and has broad compatibility across several LINQ providers.
It is important to take care not to call Skip with a negative ...
Comparing two NumPy arrays for equality, element-wise
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402
(A==B).all()
test if all values of array (A==B) are True.
Note: maybe you also want to test ...
SQL update trigger only when column is modified
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answered Aug 27 '12 at 12:10
mehdi lotfimehdi lotfi
9,6011414 gold badges7373 silver badges121121 bronze badges
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Why does 2 == [2] in JavaScript?
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edited Nov 12 '09 at 19:11
answered Nov 12 '09 at 19:00
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When to use pip requirements file versus install_requires in setup.py?
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answered Aug 16 '11 at 21:04
Ian BickingIan Bicking
8,98666 gold badges2929 silver badges3232 bronze badges
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SQL UPDATE all values in a field with appended string CONCAT not working
... linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(data, 'a');
Query OK, 4 rows affected (0.01 sec)
Rows matched: 4 Changed: 4 Warnings: 0
mysql> select * from t;
+------+--------+
| id | data |
+------+--------+
| 1 ...
log4j logging hierarchy order
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306
This table might be helpful for you:
Going down the first column, you will see how the log w...
Is There a Better Way of Checking Nil or Length == 0 of a String in Ruby?
...y than the following to check to see if a string is nil OR has a length of 0 in Ruby?
16 Answers
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Need to understand the usage of SemaphoreSlim
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i guess that if i run 50 thread at a time then code like SemaphoreSlim ss = new SemaphoreSlim(10); will force to run 10 active thread at time
That is correct; the use of the semaphore ensures that there won't be more than 10 workers doing this wo...