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How to access command line parameters?
... functions return an iterator over the arguments. The former iterates over Strings (that are easy to work with) but panics if one of the arguments is not valid unicode. The latter iterates over OsStrings and never panics.
Note that the first element of the iterator is the name of the program itself...
Remove empty elements from an array in Javascript
...d on what you consider to be "empty" for example, if you were dealing with strings, the above function wouldn't remove elements that are an empty string.
One typical pattern that I see often used is to remove elements that are falsy, which include an empty string "", 0, NaN, null, undefined, and fa...
Implementing IDisposable correctly
... User : IDisposable
{
public int id { get; protected set; }
public string name { get; protected set; }
public string pass { get; protected set; }
public User(int userID)
{
id = userID;
}
public User(string Username, string Password)
{
name = Username;...
Python extract pattern matches
...need to capture from regex. search for the pattern, if found, retrieve the string using group(index). Assuming valid checks are performed:
>>> p = re.compile("name (.*) is valid")
>>> result = p.search(s)
>>> result
<_sre.SRE_Match object at 0x10555e738>
>>>...
Why is there “data” and “newtype” in Haskell? [duplicate]
... Bool
inside the CoolBool was True or False:
helloMe :: CoolBool -> String
helloMe (CoolBool _) = "hello"
Instead of applying this function to a normal CoolBool, let's throw it a curveball and apply it to undefined!
ghci> helloMe undefined
"*** Exception: Prelude.undefined
...
How to parse a JSON string into JsonNode in Jackson?
...
A slight variation on Richards answer but readTree can take a string so you can simplify it to:
ObjectMapper mapper = new ObjectMapper();
JsonNode actualObj = mapper.readTree("{\"k1\":\"v1\"}");
share
...
Read XML file into XmlDocument
...e (text.xml). I want to read that in XmlDocument and store the stream in string variable.
5 Answers
...
What is App.config in C#.NET? How to use it?
...y database file is an Excel workbook. Since the location of the connection string is hard coded in my coding, there is no problem for installing it in my system, but for other systems there is.
...
What's wrong with overridable method calls in constructors?
...rate:
public class ConstructorCallsOverride {
public static void main(String[] args) {
abstract class Base {
Base() {
overrideMe();
}
abstract void overrideMe();
}
class Child extends Base {
final int x;...
How do I get the collection of Model State Errors in ASP.NET MVC?
...
This will give you one string with all the errors with comma separating
string validationErrors = string.Join(",",
ModelState.Values.Where(E => E.Errors.Count > 0)
.SelectMany(E => E.Errors)
...