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What is the use of hashCode in Java?
... distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java programming language.)
...
Generate .pem file used to set up Apple Push Notifications
...mmand for the generating 'apns' .pem file.
https://www.sslshopper.com/ssl-converter.html
command to create apns-dev.pem from Cert.pem and Key.pem
openssl rsa -in Key.pem -out apns-dev-key-noenc.pem
cat Cert.pem apns-dev-key-noenc.pem > apns-dev.pem
Above command is usefu...
Can a constructor in Java be private?
...of delegating constructors, the following class allows you to save a value and a type, but it only lets you do it for a subset of types, so making the general constructor private is needed to ensure that only the permitted types are used. The common private constructor helps code reuse.
public clas...
How to extract one column of a csv file
...}
' c=3 < <(dos2unix <textfile.csv)
Note the use of dos2unix to convert possible DOS style line breaks (CRLF i.e. "\r\n") and UTF-16 encoding (with byte order mark) to "\n" and UTF-8 (without byte order mark), respectively. Standard CSV files use CRLF as line break, see Wikipedia.
If the...
How do I map lists of nested objects with Dapper
...
Dapper is not a full blown ORM it does not handle magic generation of queries and such.
For your particular example the following would probably work:
Grab the courses:
var courses = cnn.Query<Course>("select * from Courses where Category = 1 Order by Creatio...
In C# what is the difference between ToUpper() and ToUpperInvariant()?
...fferent cultures. The most known example is the Turkish example, for which converting lowercase latin "i" to uppercase, doesn't result in a capitalized latin "I", but in the Turkish "I".
As for me it was confusing even with the above picture (source), I wrote a program (see source code below) to se...
Recreating a Dictionary from an IEnumerable
...the callers require the result of the method to be a dictionary. How can I convert the IEnumerable<KeyValuePair<string, ArrayList>> into a Dictionary<string, ArrayList> so that I can use TryGetValue ?
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Copy a file in a sane, safe and efficient way
... std::ios::binary);
dst << src.rdbuf();
}
This is so simple and intuitive to read it is worth the extra cost. If we were doing it a lot, better to fall back on OS calls to the file system. I am sure boost has a copy file method in its filesystem class.
There is a C method for intera...
Why is January month 0 in Java Calendar?
...a date/time API. Listing what's wrong with it would take a very long time (and I'm sure I don't know half of the problems). Admittedly working with dates and times is tricky, but aaargh anyway.
Do yourself a favour and use Joda Time instead, or possibly JSR-310.
EDIT: As for the reasons why - as n...
How to detect when WIFI Connection has been established in Android?
...that a valid network connection for HTTP exists. What should I listen for and what additional tests do I need to make to know that a valid connection exists.
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