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How to use MDC with thread pools?
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Yes, this is a common problem I've run into as well. There are a few workarounds (like manually setting it, as described), but ideally you want a solution that
Sets the MDC consistently;
Avoids tacit bugs where the MDC is incorrect but you don't know it; and
Min...
How to use an existing database with an Android application [duplicate]
...e static String DB_NAME ="YourDbName"; // Database name
private static int DB_VERSION = 1; // Database version
private final File DB_FILE;
private SQLiteDatabase mDataBase;
private final Context mContext;
public DataBaseHelper(Context context) {
super(context, DB_NAME, n...
How do I verify a method was called exactly once with Moq?
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Imagine we are building a calculator with one method for adding 2 integers. Let's further imagine the requirement is that when the add method is called, it calls the print method once. Here is how we would test this:
public interface IPrinter
{
void Print(int answer);
}
public class C...
What is the most “pythonic” way to iterate over a list in chunks?
I have a Python script which takes as input a list of integers, which I need to work with four integers at a time. Unfortunately, I don't have control of the input, or I'd have it passed in as a list of four-element tuples. Currently, I'm iterating over it this way:
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Const before or const after?
...bably know that const can be used to make either an object's data or a pointer not modifiable or both.
7 Answers
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Mapping composite keys using EF code first
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public string SomeId { get; set; }
[Key, Column(Order = 1)]
public int OtherId { get; set; }
}
You can also look at this SO question. If you want official documentation, I would recommend looking at the official EF website. Hope this helps.
EDIT: I just found a blog post from Julie Lerman...
Forward an invocation of a variadic function in C
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If you don't have a function analogous to vfprintf that takes a va_list instead of a variable number of arguments, you can't do it. See http://c-faq.com/varargs/handoff.html.
Example:
void myfun(const char *fmt, va_list argp) {
vfprintf(stderr, fmt, argp);
}
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C++: const reference, before vs after type-specifier
...ference itself is immutable, which is redundant; when dealing with const pointers both Fred const* and Fred* const are valid but different.
It's a matter of style, but I prefer using const as a suffix since it can be applied consistently including const member functions.
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What is the most efficient way to loop through dataframes with pandas? [duplicate]
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Note that iterrows is very slow (it converts every row to a series, potentially messing with your data types). When you need an iterator, better to use itertuples
– joris
Jul 29 '15 at 15:46
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PHP random string generator
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Note: str_shuffle() internally uses rand(), which is unsuitable for cryptography purposes (e.g. generating random passwords). You want a secure random number generator instead. It also doesn't allow characters to repeat.
One more way.
UPDATED...