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Preloading CSS Images
...:
body::after{
position:absolute; width:0; height:0; overflow:hidden; z-index:-1; // hide images
content:url(img1.png) url(img2.png) url(img3.gif) url(img4.jpg); // load images
}
Demo
it's better to use a sprite image to reduce http requests...(if there are many relatively small sized imag...
Array versus linked-list
...itable for
applications where it's useful to look
up an element by its index quickly,
such as heapsort. Sequential access on
arrays is also faster than on linked
lists on many machines due to locality
of reference and data caches. Linked
lists receive almost no benefit from
the cache...
Is there an IDictionary implementation that, on missing key, returns the default value instead of th
The indexer into Dictionary throws an exception if the key is missing. Is there an implementation of IDictionary that instead will return default(T) ?
...
How do shift operators work in Java? [duplicate]
...0x0f to discard any sign-extended bits so that the value can be used as an index into the array of hexadecimal characters.
// Masking sign extension.
class HexByte {
static public void main(String args[]) {
char hex[] = {
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b',...
Best way to create unique token in Rails?
...s wasn't obvious. Just add validates_uniqueness_of :token and add a unique index to the table with a migration.
– coreyward
May 16 '11 at 22:25
...
An efficient compression algorithm for short text strings [closed]
...le to get the 'predicted' next char using the current and previous char as indexes into the table. If there is a match you write a single 1 bit, otherwise write a 0, the char and update the lookup table with the current char. This approach basically maintains a dynamic (and crude) lookup table of th...
Deserializing JSON to .NET object using Newtonsoft (or LINQ to JSON maybe?)
... it. By the way, my version of Json.NET does support the syntax using the indexer on JObject, but the code I modified for my answer was pulled from code making use of an overload of the SelectToken method so I could suppress exceptions if the token wasn't found: JToken JToken.SelectToken(string tok...
How do I copy a string to the clipboard on Windows using Python?
...me.
import pandas as pd
df=pd.DataFrame(['Text to copy'])
df.to_clipboard(index=False,header=False)
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Writing files in Node.js
...
I liked Index of ./articles/file-system.
How to crop an image in OpenCV using Python
...
roi = im[y1:y2, x1:x2]
here is a comprehensive resource on numpy array indexing and slicing which can tell you more about things like cropping a part of an image. images would be stored as a numpy array in opencv2.
:)
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