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What is a stack trace, and how can I use it to debug my application errors?
...ject.Book.getTitle(Book.java:16)
To debug this, we can open up Book.java and look at line 16, which is:
15 public String getTitle() {
16 System.out.println(title.toString());
17 return title;
18 }
This would indicate that something (probably title) is null in the above code.
Exam...
How do I *really* justify a horizontal menu in HTML+CSS?
...
In this instance, you would just set the parent element's display to flex and then change the justify-content property to either space-between or space-around in order to add space between or around the children flexbox items.
Using justify-content: space-between - (example here):
ul {
l...
How can I unit test Arduino code?
...Sim-based tests
There's a lot of discussion about what unit test means and I'm not
really trying to make an argument about that here. This post is not
telling you to avoid all practical testing on your ultimate target
hardware. I am trying to make a point about optimizing your
developmen...
How do I convert a String to an int in Java?
...s function can throw a NumberFormatException, which of course you have to handle:
int foo;
try {
foo = Integer.parseInt(myString);
}
catch (NumberFormatException e)
{
foo = 0;
}
(This treatment defaults a malformed number to 0, but you can do something else if you like.)
Alternatively, you ca...
How to send an object from one Android Activity to another using Intents?
...effort to use than using Java's native serialization, but it's way faster (and I mean way, WAY faster).
From the docs, a simple example for how to implement is:
// simple class that just has one member property as an example
public class MyParcelable implements Parcelable {
private int mData;
...
What is the difference between include and require in Ruby?
My question is similar to " What is the difference between include and extend in Ruby? ".
11 Answers
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Why doesn't list have safe “get” method like dictionary?
...sociated with names) where it is inefficient to check if a key is present (and return its value) without throwing an exception, while it is super trivial to avoid exceptions accessing list elements (as the len method is very fast). The .get method allows you to query the value associated with a nam...
Maven: Failed to read artifact descriptor
...an always try mvn -U clean install
-U forces a check for updated releases and snapshots on remote repositories.
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Optimize Font Awesome for only used classes
...will have to manually trim down yourself. Open up the provided .scss file and hack out anything you don't need.
Editing the font file itself to eliminate unneeded glyphs requires a 3rd party application to do so and is beyond the scope of this question.
Fontello is an online web service that c...
Call a “local” function within module.exports from another function in module.exports?
... @NamNguyen Calling exports.foo() seems a little bit awkward and hard to read.
– Afshin Mehrabani
Jul 19 '14 at 12:20
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