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How can I be notified when an element is added to the page?
...ctical guide to using MutationObserver(): davidwalsh.name/mutationobserver-api
– gfullam
Feb 19 '16 at 19:26
4
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Is a Java string really immutable?
...ng is immutable* but this only means you cannot change it using its public API.
What you are doing here is circumventing the normal API, using reflection. The same way, you can change the values of enums, change the lookup table used in Integer autoboxing etc.
Now, the reason s1 and s2 change val...
What are metaclasses in Python?
...change the class automatically,
when it's created.
You usually do this for APIs, where you want to create classes matching the
current context.
Imagine a stupid example, where you decide that all classes in your module
should have their attributes written in uppercase. There are several ways to
do t...
Get an array of list element contents in jQuery
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api.jquery.com/map explains why there's a .get() necessary ("As the return value is a jQuery-wrapped array, it's very common to get() the returned object to work with a basic array.").
– Kitto
...
Determine when a ViewPager changes pages
...lStateChanged(int state) { }
});
Hope this help :)
Edit:
As per android APIs, setOnPageChangeListener (ViewPager.OnPageChangeListener listener) is deprecated. Please check this url:- Android ViewPager API
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Using printf with a non-null terminated string
...or me it's very useful when I receive a non-null terminated string from an API (some windows API do this!) and have to return it in a 'reasonable' way. So: long life to %.*s (or %.*S which will also make the conversion UNICODE <-> SINGLE-BYTE for you! ;) )
– FrizzTheSnail...
How to read/write from/to file using Go?
...mpatible list of all the ways to read and write files in Go.
Because file API has changed recently and most other answers don't work with Go 1. They also miss bufio which is important IMHO.
In the following examples I copy a file by reading from it and writing to the destination file.
Start with ...
How to get a substring of text?
...
Since you tagged it Rails, you can use truncate:
http://api.rubyonrails.org/classes/ActionView/Helpers/TextHelper.html#method-i-truncate
Example:
truncate(@text, :length => 17)
Excerpt is nice to know too, it lets you display an excerpt of a text Like so:
excerpt('This i...
What is the native keyword in Java for?
...JVM in C: How to call Java functions from C++?
Analogous native extension APIs are also present in many other "VM languages" for the same reasons, e.g. Python, Node.js, Ruby.
Android NDK
The concept is exact the same in this context, except that you have to use Android boilerplate to set it up.
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How to get the tag HTML with JavaScript / jQuery?
...ement
Here's the reference: https://developer.mozilla.org/en-US/docs/Web/API/Document.documentElement.
UPDATE: To then grab the html element as a string you would do:
document.documentElement.outerHTML
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