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Is Java “pass-by-reference” or “pass-by-value”?
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Java is always pass-by-value.
Unfortunately, we never handle an object at all, instead juggling object-handles called references (which are passed by value of course). The chosen terminology and semantics easily confuse many beginners.
It goes like this:
public static void main(String[] args) {
...
Create a unique number with javascript time
...ow() + Math.random()
If there is a 1 millisecond difference in function call, it is 100% guaranteed to generate a different number. For function calls within the same millisecond you should only start to be worried if you are creating more than a few million numbers within this same millisecond, w...
iPhone - Get Position of UIView within entire UIWindow
...If your superView did not have a superView your view should not be seen at all
– user4951
Mar 19 '13 at 3:41
17
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How to run a function when the page is loaded?
...e JavaScript has adopted some great functions since the release of jQuery. All modern browsers now have their own DOM ready function without the use of a jQuery library.
I'd recommend this if you use native Javascript.
document.addEventListener('DOMContentLoaded', function() {
alert("Ready!")...
Browser detection in JavaScript? [duplicate]
... +1 from me as well. Sometimes, it's not about feature support, it's actually about the browser. Yes, the user-agent info can be spoofed, but when you're dealing with older browsers and circumventing their bugs (like FF 3's issue with not sending the Content-Length header for read-only AJAX POST m...
.gitignore all the .DS_Store files in every folder and subfolder
...k the problem you're having is that in some earlier commit, you've accidentally added .DS_Store files to the repository. Of course, once a file is tracked in your repository, it will continue to be tracked even if it matches an entry in an applicable .gitignore file.
You have to manually remove th...
Is Python strongly typed?
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Python is strongly, dynamically typed.
Strong typing means that the type of a value doesn't change in unexpected ways. A string containing only digits doesn't magically become a number, as may happen in Perl. Every change of type requires an explicit...
Android: show soft keyboard automatically when focus is on an EditText
...x using AlertDialog . The EditText inside the dialog itself is automatically focused when I call AlertDialog.show() , but the soft keyboard is not automatically shown.
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How to query MongoDB with “like”?
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Actually, it depends. If the query doesn't use an index, and must do a table scan, then it can certainly be expensive. If you're doing a 'starts with' regex query, then that can use an index. Best to run an explain() to see what'...
Convert a python 'type' object to a string
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print type(someObject).__name__
If that doesn't suit you, use this:
print some_instance.__class__.__name__
Example:
class A:
pass
print type(A())
# prints <type 'instance'>
print A().__class__.__name__
# prints A
Also, it seems th...