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What is the purpose of a self executing function in javascript?
...works.
When you wrap a function definition in parentheses, and include a parameter list (another set or parentheses!) it acts as a function call.
So lets look at our code again, with some self-executing syntax:
(function main() {
var userName = "Sean";
console.log(name());
function n...
How to redirect to a different domain using NGINX?
...
Will this keep the path and query params as well?
– mpen
Dec 30 '14 at 21:56
3
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Does java.util.List.isEmpty() check if the list itself is null? [duplicate]
... specified collection is empty.
* <p>
* Null returns true.
*
* @param coll the collection to check, may be null
* @return true if empty or null
* @since Commons Collections 3.2
*/
public static boolean isEmpty(Collection coll) {
return (coll == null || coll.isEmpty());
}
...
Why shouldn't Java enum literals be able to have generic type parameters?
... the argument type is erased.
public <T> T getValue(MyEnum<T> param);
public T convert(Object);
To realise those methods you could however construct your enum as:
public enum MyEnum {
LITERAL1(String.class),
LITERAL2(Integer.class),
LITERAL3(Object.class);
private Cl...
How to set a Header field on POST a form?
... suggestion is to include either
a hidden form element
a query string parameter
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Checking if a variable is an integer
...ing of number characters), say it was a credit card number passed into the params, so it would originally be a string but you want to make sure it doesn't have any letter characters in it, I would use this method:
def is_number?(obj)
obj.to_s == obj.to_i.to_s
end
is_number? "12...
HTTP POST with URL query parameters — good idea or not? [closed]
...HTTP and I am wondering if using the HTTP POST command, but with URL query parameters only and no request body, is a good way to go.
...
How to set a JVM TimeZone Properly
...
You can pass the JVM this param
-Duser.timezone
For example
-Duser.timezone=Europe/Sofia
and this should do the trick.
Setting the environment variable TZ also does the trick on Linux.
...
How to add number of days to today's date? [duplicate]
...ytanya is very nice, but needs a minor but important improvement.
The days param must be parsed as Integer to avoid weird calculations when days is a String like "1". (I needed several hours to find out, what went wrong in my application.)
Date.prototype.addDays = function(days) {
this.setDate(...
How does a PreparedStatement avoid or prevent SQL injection?
... statements you can force the user input to be handled as the content of a parameter (and not as a part of the SQL command).
But if you don't use the user input as a parameter for your prepared statement but instead build your SQL command by joining strings together, you are still vulnerable to SQL...