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MySQL Cannot Add Foreign Key Constraint
...mand to set the encoding and collation for a table.
ALTER TABLE tablename CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci;
I hope this helps someone.
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Can you add new statements to Python's syntax?
...hon uses a custom parser generator named pgen. This is a LL(1) parser that converts Python source code into a parse tree. The input to the parser generator is the file Grammar/Grammar[1]. This is a simple text file that specifies the grammar of Python.
[1]: From here on, references to files in the ...
Should you declare methods using overloads or optional parameters in C# 4.0?
...variably conflict with an optional parameter form, and then you'll have to convert them to non-optional anyway.
And I like the notion that there's generally one super method, and the rest are simpler wrappers around that one.
...
Import pandas dataframe column as string not int
...t the following csv as strings not as int64. Pandas read_csv automatically converts it to int64, but I need this column as string.
...
round() for float in C++
... which says (emphasis mine):
A prvalue of a floating point type can be converted to a prvalue of an
integer type. The conversion truncates; that is, the fractional part
is discarded. The behavior is undefined if the truncated value cannot
be represented in the destination type.[...]
For ...
Why does integer division in C# return an integer and not a float?
... is applied to select a specific operator implementation. The operands are converted to the parameter types of the selected operator, and the type of the result is the return type of the operator.
The predefined division operators are listed below. The operators all compute the quotient of x an...
How to do the equivalent of pass by reference for primitives in Java
...e two functions are methods on the same class or class instance, you could convert toyNumber into a class member variable.
Choice 4: Create a single element array of type int and pass that
This is considered a hack, but is sometimes employed to return values from inline class invocations.
void pl...
In C#, how do I calculate someone's age based on a DateTime type birthday?
...ar - birthDate.Year;
if (age > 0)
{
age -= Convert.ToInt32(laterDate.Date < birthDate.Date.AddYears(age));
}
else
{
age = 0;
}
return age;
}
}
Now, run this test:
class Program
{
static void Main(strin...
Filtering collections in C#
...here returns an
// IEnumerable<T> so a call to ToList is required to convert back to a List<T>.
List<int> filteredList = myList.Where( x => x > 7).ToList();
If you can't find the .Where, that means you need to import using System.Linq; at the top of your file.
...
How to add items to a spinner in Android?
...
This code basically reads a JSON array object and convert each row into an option in the spinner that is passed as a parameter:
public ArrayAdapter<String> getArrayAdapterFromArrayListForSpinner(ArrayList<JSONObject> aArrayList, String aField)
{
ArrayAdapter...