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Using Pairs or 2-tuples in Java [duplicate]
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While the intended purpose of this class is to facilitate the creation of custom map implementation according to the javadoc, this gets the job done nicely. +1. Also, readability isn't that big of an issue in this case.
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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...
Python pandas: fill a dataframe row by row
...sign a dictionary
to each element of the row y probably not what you want; converting to a Series tells pandas
that you want to align the input (for example you then don't have to to specify all of the elements)
In [7]: df = pandas.DataFrame(columns=['a','b','c','d'], index=['x','y','z'])
In [8]: ...
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...
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) ...
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...
Datetime equal or greater than today in MySQL
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plus this takes a lot of time as there is overhead of converting DATETIME to date via the DATE() function and then comparing with the where condition.
– roopunk
Aug 14 '14 at 9:48
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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...
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)...
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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