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Array initialization syntax when not in a declaration
...an use the toArray() method on it.
For example:
ArrayList<String> al = new ArrayList<String>();
al.add("one");
al.add("two");
String[] strArray = (String[]) al.toArray(new String[0]);
I hope this might help you.
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Logical operator in a handlebars.js {{#if}} conditional
...ars one thing that wasn't clear is that you have to pass the operator as a string or else the compiler will error out while tokenizing your template. {{#ifCond true '==' false}}
– Joe Holloway
Jul 11 '13 at 20:11
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Runtime vs. Compile time
...ink of it in terms of errors, and when they can be caught.
Compile time:
string my_value = Console.ReadLine();
int i = my_value;
A string value can't be assigned a variable of type int, so the compiler knows for sure at compile time that this code has a problem
Run time:
string my_value = Cons...
How do I prevent the modification of a private field in a class?
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You must return a copy of your array.
public String[] getArr() {
return arr == null ? null : Arrays.copyOf(arr, arr.length);
}
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improve this answer
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implements Closeable or implements AutoCloseable
...small example
public class TryWithResource {
public static void main(String[] args) {
try (TestMe r = new TestMe()) {
r.generalTest();
} catch(Exception e) {
System.out.println("From Exception Block");
} finally {
System.out.println("...
How to convert an integer to a string in any base?
Python allows easy creation of an integer from a string of a given base via
27 Answers
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uppercase first character in a variable with bash
I want to uppercase just the first character in my string with bash.
15 Answers
15
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How to round a number to n decimal places in Java
What I would like is a method to convert a double to a string which rounds using the half-up method - i.e. if the decimal to be rounded is 5, it always rounds up to the next number. This is the standard method of rounding most people expect in most situations.
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How to clear all s’ contents inside a parent ?
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Using .empty() would be a better option as no string parsing is involved. It operates directly on the DOM object model.
– Drew Noakes
Aug 22 '10 at 19:43
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Check for column name in a SqlDataReader object
...taRecordExtensions
{
public static bool HasColumn(this IDataRecord dr, string columnName)
{
for (int i=0; i < dr.FieldCount; i++)
{
if (dr.GetName(i).Equals(columnName, StringComparison.InvariantCultureIgnoreCase))
return true;
}
...