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How to override equals method in Java
... main(String[] args) {
// TODO code application logic here
ArrayList<Person> people = new ArrayList<Person>();
people.add(new Person("Subash Adhikari", 28));
people.add(new Person("K", 28));
people.add(new Person("StackOverflow", 4));
peopl...
What is “vectorization”?
...s of rewriting a loop so that instead of processing a single element of an array N times, it processes (say) 4 elements of the array simultaneously N/4 times.
(I chose 4 because it's what modern hardware is most likely to directly support; the term "vectorization" is also used to describe a higher ...
Curly braces in string in PHP
...
it allows for the use of complex expressions.
Any scalar variable, array element or object property with a string
representation can be included via this syntax. Simply write the
expression the same way as it would appear outside the string, and
then wrap it in { and }. Since { can not...
How to convert SQL Query result to PANDAS Data Structure?
...esses a database cursor with data on it into either
a structured numpy array or a pandas dataframe.
input:
cur - a pyodbc cursor that has just received data
dataframe - bool. if false, a numpy record array is returned
if true, return a pandas dataframe
index - li...
How do you sort an array on multiple columns?
I have a multidimensional array. The primary array is an array of
16 Answers
16
...
Can I embed a custom font in an iPhone application?
...g the UIAppFonts key in their Info.plist file. The value of this key is an array of strings identifying the font files in the application’s bundle. When the system sees the key, it loads the specified fonts and makes them available to the application.
Once the fonts have been set in the Info.pli...
Detect & Record Audio in Python
...microphone and process the resulting data:
from sys import byteorder
from array import array
from struct import pack
import pyaudio
import wave
THRESHOLD = 500
CHUNK_SIZE = 1024
FORMAT = pyaudio.paInt16
RATE = 44100
def is_silent(snd_data):
"Returns 'True' if below the 'silent' threshold"
...
vector vs. list in STL
...emove elements to or from the vector.
You can easily get at the underlying array if you need an array of the elements.
list:
Non-contiguous memory.
No pre-allocated memory. The memory overhead for the list itself is constant.
Each element requires extra space for the node which holds the element...
PHP - how to best determine if the current invocation is from CLI or web server?
...f ( php_sapi_name() === 'cli' )
{
return true;
}
if ( array_key_exists('SHELL', $_ENV) ) {
return true;
}
if ( empty($_SERVER['REMOTE_ADDR']) and !isset($_SERVER['HTTP_USER_AGENT']) and count($_SERVER['argv']) > 0)
{
return true;
}
if (...
Explain the use of a bit vector for determining if all characters are unique
...ery bit in integer value can be treated as a flag, so eventually int is an array of bits (flag). Each bit in your code states whether the character with bit's index was found in string or not. You could use bit vector for the same reason instead of int. There are two differences between them:
Size...