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in entity framework code first, how to use KeyAttribute on multiple columns
...I define a PK on more then one column, and specifically, how can I control order of the columns in the index? Is it a result of the order of properties in the class?
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Advantages of Binary Search Trees over Hash Tables
...s that binary search tree allows you to do range searches efficiently.
In order to illustrate my idea, I want to make an extreme case. Say you want to get all the elements whose keys are between 0 to 5000. And actually there is only one such element and 10000 other elements whose keys are not in th...
Concurrent vs serial queues in GCD
...serial) is the ONLY element that decides whether the tasks are executed in order or in paralel;; (2)the dispatch type (sync or async) is only saying whether the execution goes OR doesn't go to the next instruction? I mean, if I dispatch a task SYNC the code will block until that tasks finishes, no m...
multiprocessing.Pool: When to use apply, apply_async or map?
...ch as
[1, 0, 4, 9, 25, 16, 49, 36, 81, 64]
Notice, unlike pool.map, the order of the results may not correspond to the order in which the pool.apply_async calls were made.
So, if you need to run a function in a separate process, but want the current process to block until that function returns...
Is there a Java reflection utility to do a deep comparison of two objects?
...with different options like ignoring Java default/null values and ignoring order of collections
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Rearranging Tab Bar Controller Order in StoryBoard
...ips to 4 different Table View Controllers. Is there a way to rearrange the order of the relationship in the StoryBoard graphically? I can't find a way to do this and I'm sure I must be missing something!
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Byte order mark screws up file reading in Java
I'm trying to read CSV files using Java. Some of the files may have a byte order mark in the beginning, but not all. When present, the byte order gets read along with the rest of the first line, thus causing problems with string compares.
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How to sort an ArrayList in Java [duplicate]
...s and adding each fruit in the list. I want to sort this list based on the order of fruit name.
3 Answers
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quick random row selection in Postgres
...u want to use a higher LIMIT... I need to get 3 items so I need to use the ORDER BY RANDOM() syntax.
– Alexis Wilke
Nov 24 '12 at 1:29
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ROW_NUMBER() in MySQL
...ent. You might get the results you expect, but this is not guaranteed. The order of evaluation for expressions involving user variables is undefined and may change based on the elements contained within a given statement."
– Roland Bouman
Jan 11 '10 at 13:51
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