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What's the meaning of interface{}?
...all types implement at least zero methods, and satisfying an interface is done automatically, all types satisfy the empty interface.
That means that if you write a function that takes an interface{} value as a parameter, you can supply that function with any value.
(That is what Msg represents i...
How to get the focused element with jQuery?
...focus');
// No jQuery:
elem === elem.ownerDocument.activeElement;
Which one should you use? quoting the jQuery docs:
As with other pseudo-class selectors (those that begin with a ":"), it is recommended to precede :focus with a tag name or some other selector; otherwise, the universal selecto...
Split code over multiple lines in an R script
...
Thanks Joris. I saw the examples similar to the ones you have given in the some online documentation and tried that for the string too. I thought that if it does not encounter a closing quote, it will continue to the next line. But with string it does not work, or rather, ...
How to programmatically click a button in WPF?
...ts using a provided factory to get the automation peer instead of creating one yourself.
– Greg D
Apr 8 '09 at 11:46
7
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JAX-RS / Jersey how to customize error handling?
...he first approach is to create an Exception class that extends WebApplicationException.
Example:
public class NotAuthorizedException extends WebApplicationException {
public NotAuthorizedException(String message) {
super(Response.status(Response.Status.UNAUTHORIZED)
.ent...
Does every Core Data Relationship have to have an Inverse?
...it into this case.
Assume you modeled it as follows:
Note you have a to-one relationship called "type", from SocialApp to SocialAppType. The relationship is non-optional and has a "deny" delete rule.
Now consider the following:
SocialApp *socialApp;
SocialAppType *appType;
// assume entity inst...
What is the easiest way to ignore a JPA field during persistence?
... response.
In order to avoid a field from an entity to be persisted in DB one can use one of the two mechanisms:
@Transient - the JPA annotation marking a field as not persistable
transient keyword in java. Beware - using this keyword, will prevent the field to be used with any serialization mech...
Git will not init/sync/update new submodules
...t work, then as described above git submodule add url should do the trick. One can cross check this by
git config --list
and one should get an entry of the submodule you want to pull in the result of the git config --list command. If there is an entry of your submodule in the config result, the...
How do I rename an open file in Emacs?
...e in Emacs? While I'm viewing it? Something like save-as, but the original one should go away.
10 Answers
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What is “export default” in javascript?
...en export default is used, this is much simpler. Script files just exports one thing.
cube.js
export default function cube(x) {
return x * x * x;
};
and used as
App.js
import Cube from 'cube';
console.log(Cube(3)); // 27
...