I can't use mysql .How should i config the file of php.ini . the message:
Fatal error: Call to undefined function mysql_errno() in /var/www/html/inc/dv_clssql.php on line 129
how should i do? please help me (2 Replies)
This problem has been killing me all day, and I cannot solve it.
Basically, I am using node.js with the mysql module and it will not connect to the database.
Here is the JS code snippet in node.js:
app.get("/test", function(req, res) {
var mysql = require("mysql");
var con =... (4 Replies)
In my further exploration of Arduino, today I decided to install the arduino-cli on my mac today.
https://github.com/arduino/arduino-cli
I followed the instructions for macOS but when I got to this part:
arduino-cli board list
I got the dreaded "Unknown" Fully Qualified Board Name... (1 Reply)
Here is a useful SSL (HTTPS) application for anyone with a remote Linux server they want to keep an eye on using Blynk and the NodeMCU ESP8266. This little app also works (have tested as well) on the WeMos D1 ESP8266 Arduino board.
The NodeMCU setup could not be easier, just find a... (8 Replies)
Here we go....
Preface:
..... so in a galaxy far, far, far away from commercial, data sharing corporations.....
For this project, I used the ESP-WROOM-32 as an MQTT (publish / subscribe) client which receives Linux server "load averages" as messages published as MQTT pub/sub messages.... (6 Replies)
After setting up MQTT and testing some ESP8266 and ESP32 modules, where I noted that testing in Programming ESP32 (ESP-WROOM-32) as an MQTT Client Subscribed to Linux Server Load Average Messages, I was so impressed with MQTT that I installed MQTT on three different computers, instantly and... (2 Replies)
Various Node-Red crypto modules do not work with PHP, so to send an encrypted message from a PHP script (in this case from a Ubuntu server) to Node-RED we need our own code.
After a few hours of searching, testing various libs, more testing and debugging, I got this PHP to Node-RED code... (0 Replies)
First, I want to thank Neo (LOL) for this post from 2018, Node.js and mysql - ER_ACCESS_DENIED_ERROR
I could not get the Node-RED mysql module to work and searched Google until all my links were purple! I kept getting ER_ACCESS_DENIED_ERROR with the right credentials. Nothing on the web was... (0 Replies)
Discussion started by: Neo
0 Replies
LEARN ABOUT DEBIAN
tree::redblack
RedBlack(3pm) User Contributed Perl Documentation RedBlack(3pm)NAME
Tree::RedBlack - Perl implementation of Red/Black tree, a type of balanced tree.
SYNOPSIS
use Tree::RedBlack;
my $t = new Tree::RedBlack;
$t->insert(3, 'cat');
$t->insert(4, 'dog');
my $v = $t->find(4);
my $min = $t->min;
my $max = $t->max;
$t->delete(3);
$t->print;
DESCRIPTION
This is a perl implementation of the Red/Black tree algorithm found in the book "Algorithms", by Cormen, Leiserson & Rivest (more commonly
known as "CLR" or "The White Book"). A Red/Black tree is a binary tree which remains "balanced"- that is, the longest length from root to
a node is at most one more than the shortest such length. It is fairly efficient; no operation takes more than O(lg(n)) time.
A Tree::RedBlack object supports the following methods:
new ()
Creates a new RedBlack tree object.
root ()
Returns the root node of the tree. Note that this will either be undef if no nodes have been added to the tree, or a
Tree::RedBlack::Node object. See the Tree::RedBlack::Node manual page for details on the Node object.
cmp (&)
Use this method to set a comparator subroutine. The tree defaults to lexical comparisons. This subroutine should be just like a
comparator subroutine to sort, except that it doesn't do the $a, $b trick; the two elements to compare will just be the first two items
on the stack.
insert ($;$)
Adds a new node to the tree. The first argument is the key of the node, the second is its value. If a node with that key already
exists, its value is replaced with the given value and the old value is returned. Otherwise, undef is returned.
delete ($)
The argument should be either a node object to delete or the key of a node object to delete. WARNING!!! THIS STILL HAS BUGS!!!
find ($)
Searches the tree to find the node with the given key. Returns the value of that node, or undef if a node with that key isn't found.
Note, in particular, that you can't tell the difference between finding a node with value undef and not finding a node at all. If you
want to determine if a node with a given key exists, use the node method, below.
node ($)
Searches the tree to find the node with the given key. Returns that node object if it is found, undef otherwise. The node object is a
Tree::RedBlack::Node object.
min ()
Returns the node with the minimal key.
max ()
Returns the node with the maximal key.
AUTHOR
Benjamin Holzman <bholzman@earthlink.net>
SEE ALSO
Tree::RedBlack::Node
perl v5.10.0 2008-07-31 RedBlack(3pm)