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instanceof Vs getClass( )
...learned an alternative yesterday
We all know you can do:
if(o instanceof String) { // etc
but what if you dont know exactly what type of class it needs to be?
you cannot generically do:
if(o instanceof <Class variable>.getClass()) {
as it gives a compile error.
Instead, here is an ...
Java lib or app to convert CSV to XML file? [closed]
...stream.XStream;
public class CsvToXml {
public static void main(String[] args) {
String startFile = "./startData.csv";
String outFile = "./outData.xml";
try {
CSVReader reader = new CSVReader(new FileReader(startFile));
String[] line = nul...
Iterating Through a Dictionary in Swift
...
let dict : [String : Any] = ["FirstName" : "Maninder" , "LastName" : "Singh" , "Address" : "Chandigarh"]
dict.forEach { print($0) }
Result would be
("FirstName", "Maninder")
("LastName", "Singh")
("Address", "Chandigarh")
...
What are '$$' used for in PL/pgSQL
...actically anywhere in SQL scripts.
The body of a function happens to be a string literal which has to be enclosed in single quotes. Dollar-quoting is a PostgreSQL-specific substitute for single quotes to avoid quoting issues inside the function body. You could write your function definition with si...
Determine the number of NA values in a column
...nt the number of NA values in a data frame column. Say my data frame is called df , and the name of the column I am considering is col . The way I have come up with is following:
...
Undo git reset --hard with uncommitted files in the staging area
...e of problems - --cached should be --cache, and I found that it didn't actually create the .git/lost-found directory. However, the following steps worked for me:
git fsck --cache --unreachable $(git for-each-ref --format="%(objectname)")
That should output all objects in the object database that...
How do I use su to execute the rest of the bash script as that user?
I've written a script that takes, as an argument, a string that is a concatenation of a username and a project. The script is supposed to switch (su) to the username, cd to a specific directory based upon the project string.
...
How do I scale a stubborn SVG embedded with the tag?
...nd this information here:
https://blueprints.launchpad.net/inkscape/+spec/allow-browser-resizing
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How do you implement a “Did you mean”? [duplicate]
... have had good results with using Edit Distance, a mathematical measure of string similarity that works surprisingly well. I used to use Levenshtein but the others may be worth looking into.
Soundex - in my experience - is crap.
Actually efficiently storing and searching a large dictionary of miss...
C# if/then directives for debug vs release
...em only executed if a certain symbol is defined. The compiler would remove all calls to those methods if the symbol is not defined:
[Conditional("DEBUG")]
void PrintLog() {
Console.WriteLine("Debug info");
}
void Test() {
PrintLog();
}
...