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400 BAD request HTTP error code meaning?
...means that the request was malformed. In other words, the data stream sent by the client to the server didn't follow the rules.
In the case of a REST API with a JSON payload, 400's are typically, and correctly I would say, used to indicate that the JSON is invalid in some way according to the API s...
What do the makefile symbols $@ and $< mean?
...go, I had spend some time figuring out what's happend in the result caused by this behaviour.
– Chan Kim
Jul 11 '18 at 5:48
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How to allow remote connection to mysql
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That is allowed by default on MySQL.
What is disabled by default is remote root access. If you want to enable that, run this SQL command locally:
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'password' WITH GRANT OPTION;
FLUS...
Difference between JVM and HotSpot?
...al Machine is stated in the Java Virtual Machine Specification
The JVM is by definition a virtual machine, i. e. a software machine that simulates what a real machine does. Like a real machine, it has an instruction set, a virtual computer architecture and an execution model. It is capable of runni...
Efficiency of purely functional programming
... an algorithm in the pure Lisp that runs in O(n log n) time (based on work by Ben-Amram and Galil [1992] about simulating random access memory using only pointers). Pippenger also establishes that there are algorithms for which that is the best you can do; there are problems which are O(n) in the im...
SqlAlchemy - Filtering by Relationship Attribute
...ient.query.join(Patient.mother, aliased=True)\
.filter_by(phenoscore=10)
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C read file line by line
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If your task is not to invent the line-by-line reading function, but just to read the file line-by-line, you may use a typical code snippet involving the getline() function (see the manual page here):
#define _GNU_SOURCE
#include <stdio.h>
#include <stdl...
How to select the nth row in a SQL database table?
...indowing functions:
SELECT * FROM (
SELECT
ROW_NUMBER() OVER (ORDER BY key ASC) AS rownumber,
columns
FROM tablename
) AS foo
WHERE rownumber <= n
(which I just copied from the site linked above since I never use those DBs)
Update: As of PostgreSQL 8.4 the standard windowing funct...
Evenly distributing n points on a sphere
...er time as points are added. Here's another great interactive example made by @gman. And here's a simple implementation in python.
import math
def fibonacci_sphere(samples=1):
points = []
phi = math.pi * (3. - math.sqrt(5.)) # golden angle in radians
for i in range(samples):
...
Why does Google prepend while(1); to their JSON responses?
...he URL via a <script> tag. The URL is visited with your cookies, and by overriding the global array constructor or accessor methods they can have a method called whenever an object (array or hash) attribute is set, allowing them to read the JSON content.
The while(1); or &&&BLAH&a...