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A semantics for Bash scripts?
...ell is implemented. Here's an implementation I did as an exercise. It's in Python, but I hope that's not a hangup for anyone. It's not terribly robust, but it is instructive:
#!/usr/bin/env python
from __future__ import print_function
import os, sys
'''Hacky barebones shell.'''
try:
input=raw_...
Easy way to test a URL for 404 in PHP?
...
I found this answer here:
if(($twitter_XML_raw=file_get_contents($timeline))==false){
// Retrieve HTTP status code
list($version,$status_code,$msg) = explode(' ',$http_response_header[0], 3);
// Check the HTTP Status code
switch($status_code) {
...
How to write DataFrame to postgres table?
...
For Python 2.7 and Pandas 0.24.2 and using Psycopg2
Psycopg2 Connection Module
def dbConnect (db_parm, username_parm, host_parm, pw_parm):
# Parse in connection information
credentials = {'host': host_parm, 'database': ...
How do I import the javax.servlet API in my Eclipse project?
...
Add javax.servlet dependency in pom.xml. Your problem will be resolved.
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.0.1</version>
<scope>pro...
When should null values of Boolean be used?
...ent Database boolean values, which may be true, false or null
to represent XML Schema's xsd:boolean values declared with xsd:nillable="true"
to be able to use generic types: List<Boolean> - you can't use List<boolean>
...
How to import data from mongodb to pandas?
...ing into RAM) data efficiently (i.e. with parallel execution), you can try Python Blaze ecosystem: Blaze / Dask / Odo.
Blaze (and Odo) has out-of-the-box functions to deal with MongoDB.
A few useful articles to start off:
Introducing Blaze Expessions (with MongoDB query example)
ReproduceIt: Red...
Performance of Java matrix math libraries? [closed]
...The results are as follows.
Using multithreaded ATLAS with C/C++, Octave, Python and R, the time taken was around 4 seconds.
Using Jama with Java, the time taken was 50 seconds.
Using Colt and Parallel Colt with Java, the time taken was 150 seconds!
Using JBLAS with Java, the time taken was agai...
What is REST? Slightly confused [closed]
...t is represented via some media type. Some examples of media types include XML, JSON, and RDF. Resources are manipulated by components. Components request and manipulate resources via a standard uniform interface. In the case of HTTP, this interface consists of standard HTTP ops e.g. GET, PUT, POST,...
PHP shell_exec() vs exec()
...a string with newlines in it
Conversely, if the output of the command is xml or json, then having each line as part of an array is not what you want, as you'll need to post-process the input into some other form, so in that case use shell_exec.
It's also worth pointing out that shell_exec is an a...
How to strip all non-alphabetic characters from string in SQL Server?
...re has to be a pure SQL method that does not require a function or a CTE / XML query, and doesn't involve difficult to maintain nested REPLACE statements. Here is my solution:
SELECT
x
,CASE WHEN a NOT LIKE '%' + SUBSTRING(x, 1, 1) + '%' THEN '' ELSE SUBSTRING(x, 1, 1) END
+ CASE WHEN a NO...