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Why does this iterative list-growing code give IndexError: list assignment index out of range?
... element by attempting to write to an index that is out of range. j[0] = "foo" will work if the list already has at least one element.
– Steve Mayne
Jan 28 '19 at 13:49
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Is there an “exists” function for jQuery?
...ame thing. JQuery selectors can be used for any CSS rule - for example $('#foo a.special'). And it can return more than one element. getElementById can't begin to approach that.
– kikito
Mar 7 '12 at 16:30
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What does = +_ mean in JavaScript
...s to a number.
_ is only a variable name (not an operator), it could be a, foo etc.
Example:
+"1"
cast "1" to pure number 1.
var _ = "1";
var r = +_;
r is now 1, not "1".
Moreover, according to the MDN page on Arithmetic Operators:
The unary plus operator precedes its operand and evalua...
How to display a dynamically allocated array in the Visual Studio debugger?
...re an easy way to tell the debugger, show me this data as an array of type Foo and size X?
9 Answers
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Getting hold of the outer class object from the inner class object
...
Here's the example:
// Test
public void foo() {
C c = new C();
A s;
s = ((A.B)c).get();
System.out.println(s.getR());
}
// classes
class C {}
class A {
public class B extends C{
A get() {return A.this;}
}
public String getR() {
...
Putting an if-elif-else statement on one line?
...but only for expressions, not for statements:
>>> a = "Hello" if foo() else "Goodbye"
Edit:
Your revised question now shows that the three statements are identical except for the value being assigned. In that case, a chained ternary operator does work, but I still think that it's less r...
No Persistence provider for EntityManager named
...deprecated, see above. Use hibernate-core instead.
– foo
Feb 10 '18 at 1:29
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how to check if object already exists in a list
...e those 2 properties, you could:
bool alreadyExists = myList.Any(x=> x.Foo=="ooo" && x.Bar == "bat");
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Java dynamic array sizes?
...u cannot simple create an ArrayList with 20 elements and then call set(15, foo).
You cannot directly change the size of an ArrayList. You do it indirectly using the various add, insert and remove methods.
If you want something more array-like, you will need to design your own API. (Maybe someone...
How do I use the CONCAT function in SQL Server 2008 R2?
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You can use SELECT {fn concat ('foo', 'bar')}; in previous versions. Only accepts 2 parameters though.
– Martin Smith
May 11 '12 at 11:22
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