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How to use Oracle ORDER BY and ROWNUM correctly?
I am having a hard time converting stored procedures from SQL Server to Oracle to have our product compatible with it.
4 An...
omp parallel vs. omp parallel for
...uns fine but when I am invoking this code from an MPI program then it runs into an infinite loop. The loop counter is zero in all iterations of this loop. I have the loop counter defined as private in the #pragma omp parallel directive. No idea why it only fails when MPI is invoking the code. I am s...
How do I count unique values inside a list
...s are thrown away, and list.count() is O(n) anyway. You don't even need to convert aa to list at all. See Vidul's answer instead.
– wjandrea
Sep 23 at 15:38
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MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...
... NOT NULL, tbl CHAR(64) NOT NULL, chunk INT NOT NULL, chunk_time FLOAT NULL, chunk_index VARCHAR(200) NULL, lower_boundary TEXT NULL, upper_boundary TEXT NULL, this_crc CHAR(40) ...
What's the difference between utf8_general_ci and utf8_unicode_ci?
...f either _unicode or _general. Much of what's written below is not of much interest anymore if you can use one of the newer collations instead.
Key differences
utf8mb4_unicode_ci is based on the official Unicode rules for universal sorting and comparison, which sorts accurately in a wide range of l...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
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They are hint to the compiler to emit instructions that will cause branch prediction to favour the "likely" side of a jump instruction. This can be a big win, if the prediction is correct it means that the jump instruction is basically...
Creating a copy of an object in C# [duplicate]
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There is no built-in way. You can have MyClass implement the IClonable interface (but it is sort of deprecated) or just write your own Copy/Clone method. In either case you will have to write some code.
For big objects you could consider Serialization + Deserialization (through a MemoryStream)...
Android ACTION_IMAGE_CAPTURE Intent
...the small Bitmap image. However, if we putExtra(EXTRA_OUTPUT,...) on the intent before starting it, everything works until you try to hit the "Ok" button in the camera app. The "Ok" button just does nothing. The camera app stays open and nothing locks up. We can cancel out of it, but the file neve...
org.hibernate.MappingException: Could not determine type for: java.util.List, at table: College, for
...t field solved this issue:
@Column
@ElementCollection(targetClass=Integer.class)
private List<Integer> countries;
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Difference between getDefaultSharedPreferences and getSharedPreferences
... {
return context.getPackageName() + "_preferences";
}
private static int getDefaultSharedPreferencesMode() {
return Context.MODE_PRIVATE;
}
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