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Why do this() and super() have to be the first statement in a constructor?
... in your constructor, the parent class has already been set up correctly.
What you are trying to do, pass args to the super constructor is perfectly legal, you just need to construct those args inline as you are doing, or pass them in to your constructor and then pass them to super:
public MySubCl...
How to exit a function in bash
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Could you explain more on the inner function fail, what is the colon doing here?
– brook hong
Apr 25 '19 at 2:38
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How to Turn Off Showing Whitespace Characters in Visual Studio IDE
I don't know what I did but I don't know how to get rid of those arrows on the left.
6 Answers
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Convert NaN to 0 in javascript
...ver the web, so I won't go in why it works here, but if you're interested: What is the "double tilde" (~~) operator in JavaScript?
We can exploit this property of a double-tilde to convert NaN to a number, and happily that number is zero!
console.log(~~NaN); // 0
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simple HTTP server in Java using only Java SE API
...se
As to using com.sun.* classes, do note that this is, in contrary to what some developers think, absolutely not forbidden by the well known FAQ Why Developers Should Not Write Programs That Call 'sun' Packages. That FAQ concerns the sun.* package (such as sun.misc.BASE64Encoder) for internal u...
How to structure a express.js application?
... |-zoo.js
| |~models
| |-zoo.js
|-index.js
I use Exports to return what's relevant. For instance, in the models I do:
module.exports = mongoose.model('PhoneNumber', PhoneNumberSchema);
and then if I need to create a phone number, it's as simple as:
var PhoneNumber = require('../models/phone...
How to add multiple font files for the same font?
...erfect for fonts that do have a separate TTF file for bold and italic. But what if the whole font is in one .ttf file and you want to use bold, how does that work?
– user836645
Jul 9 '11 at 11:42
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Is it possible to read the value of a annotation in java?
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Exactly! I have been struggling to figure that out too. What if i want to have an annotation processor that does not need to be explicitly provided with a class name? Can it be made to pick it up from the context; 'this'??
– 5122014009
Sep 17...
JPA EntityManager: Why use persist() over merge()?
...ither way will add an entity to a PersistenceContext, the difference is in what you do with the entity afterwards.
Persist takes an entity instance, adds it to the context and makes that instance managed (ie future updates to the entity will be tracked).
Merge returns the managed instance that th...
Most Pythonic way to provide global configuration variables in config.py? [closed]
... years old, but I'm a beginner and I think this config file is essentially what I am looking for (maybe too advanced), and I would like to understand it better. Do I just pass initialize ConfigHolder with a dict of configs I'd like to set and pass between modules?
– Jinx
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