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Check Whether a User Exists
...e-exists
– guettli
Oct 11 '13 at 11:09
24
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How to detect if a variable is an array
...efore, it might be a good idea to check if the object has a property named 0 instead, which can be done via one of these checks:
typeof obj[0] !== 'undefined' // false negative for `obj[0] = undefined`
obj.hasOwnProperty('0') // exclude array-likes with inherited entries
'0' in Object(obj) // inclu...
How to make Git pull use rebase by default for all my repositories?
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edited Oct 18 '18 at 18:30
answered Dec 20 '12 at 14:45
Pa...
How to set a selected option of a dropdown list control using angular JS
... in the control, updates the other. If item.selectedVariant has a value of 0, that item should get selected.
If variants is an array of objects, item.selectedVariant must be set to one of those objects. I do not know which information you have in your scope, but here's an example:
JS:
$scope.opti...
What is the benefit of zerofill in MySQL?
..., 123456789);
SELECT x, y FROM yourtable;
Result:
x y
00000001 1
00000012 12
00000123 123
123456789 123456789
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Assert an object is a specific type
...tanceOf;
import static org.junit.Assert.assertThat;
/**
* @author maba, 2012-09-13
*/
public class InstanceOfTest {
@Test
public void testInstanceOf() {
SubClass subClass = new SubClass();
assertThat(subClass, instanceOf(BaseClass.class));
}
}
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How to select lines between two marker patterns which may occur multiple times with awk/sed
... to trigger the print when necessary:
$ awk '/abc/{flag=1;next}/mno/{flag=0}flag' file
def1
ghi1
jkl1
def2
ghi2
jkl2
How does this work?
/abc/ matches lines having this text, as well as /mno/ does.
/abc/{flag=1;next} sets the flag when the text abc is found. Then, it skips the line.
/mno/{f...
What is the HEAD in git?
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edited Nov 30 '16 at 12:30
Maroun
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How do I reflect over the members of dynamic object?
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answered Oct 26 '11 at 1:01
jbtulejbtule
29.1k1111 gold badges8686 silver badges125125 bronze badges
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EJB's - when to use Remote and/or local interfaces?
...ot distributing EJBs on a different tier and they fixed the spec (in EJB 2.0) by introducing the concept of Local interfaces so that clients collocated in the same virtual machine with the EJB container can call EJBs using direct method invocation, totally bypassing RMI semantics (and the associated...