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Get properties and values from unknown object
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Here's something I use to transform an IEnumerable<T> into a DataTable that contains columns representing T's properties, with one row for each item in the IEnumerable:
public static DataTable ToDataTable<T>(IEnumerable<T> items)
{
var table = CreateDataTableForPropertiesO...
How to report an error from a SQL Server user-defined function
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For an inline-table-valued-function where the RETURN is a simple select, this alone doesn't work because nothing is returned - not even null, and in my case I wanted to throw an error when nothing was found. I didn't want to break down th...
How can I check if a View exists in a Database?
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I like this one. You can use 'u' for tables as well.
– Phillip Senn
Oct 10 '15 at 22:47
2
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Logical operators for boolean indexing in Pandas
...[4])
>>> a3[np.bitwise_and(a1, a2)]
array([1, 1, 1, 2])
Summary table
Logical operator | NumPy logical function | NumPy bitwise function | Bitwise operator
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and | np.logical_and | np...
How to use Servlets and Ajax?
...gt; as JSON
Here's an example which displays List<Product> in a <table> where the Product class has the properties Long id, String name and BigDecimal price. The servlet:
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, I...
Removing a list of characters in string
...was changed and now takes 1 parameter instead of 2.
That parameter is a table (can be dictionary) where each key is the Unicode ordinal (int) of the character to find and the value is the replacement (can be either a Unicode ordinal or a string to map the key to).
Here is a usage example:
>&...
How can I find non-ASCII characters in MySQL?
... but I would suggest trying a variant of a query like this:
SELECT * FROM tableName WHERE columnToCheck NOT REGEXP '[A-Za-z0-9]';
That query will return all rows where columnToCheck contains any non-alphanumeric characters. If you have other characters that are acceptable, add them to the charact...
How do I convert from BLOB to TEXT in MySQL?
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Usage: SELECT CONVERT(column USING utf8) FROM table;
– bmaupin
Oct 2 '12 at 19:32
4
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Scala: What is a TypeTag and how do I use it?
...flect.ClassTag[List[Int]] =↩
ClassTag[class scala.collection.immutable.List]
As one can see above, they don't care about type erasure, therefore if one wants "full" types TypeTag should be used:
scala> typeTag[List[Int]]
res105: reflect.runtime.universe.TypeTag[List[Int]] = TypeTag[s...
How to change MySQL column definition?
I have a mySQL table called test:
3 Answers
3
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