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add column to mysql table if it does not exist
...sFieldExisting
$$
CREATE FUNCTION isFieldExisting (table_name_IN VARCHAR(100), field_name_IN VARCHAR(100))
RETURNS INT
RETURN (
SELECT COUNT(COLUMN_NAME)
FROM INFORMATION_SCHEMA.columns
WHERE TABLE_SCHEMA = DATABASE()
AND TABLE_NAME = table_name_IN
AND COLUMN_NAME = field_...
Add regression line equation and R^2 on graph
...
+100
Here is one solution
# GET EQUATION AND R-SQUARED AS STRING
# SOURCE: https://groups.google.com/forum/#!topic/ggplot2/1TgH-kG5XMA
...
Integer division with remainder in JavaScript?
...buu. a = 12447132275286670000; b = 128 Math.floor(a/b) -> 97243220900677100 and ~~(a/b) -> -1231452688.
– Mirek Rusin
Mar 26 '14 at 13:03
7
...
Access mysql remote database from command line
...mysqld.cnf you must change 127.0.0.1 with your local ip address (192.168.1.100) in order to have access over the Lan. example bellow:
sudo nano /etc/mysql/mysql.conf.d/mysqld.cnf
Search for bind-address in my.cnf or mysqld.cnf
bind-address = 127.0.0.1
and change 127.0.0.1 to 192.1...
Javascript Thousand Separator / string format [duplicate]
...
this function breaks for numbers greater than 100,000
– DevZer0
Apr 28 '15 at 7:27
1
...
Are Javascript arrays sparse?
...k you actually get a dense array if you say something like foo = new Array(10000). However, this is supposed to work: foo = Array.apply(null, {length: 10});.
– doubleOrt
Oct 2 '17 at 11:04
...
How to change JFrame icon [duplicate]
...d(bttn);
frm.setIconImage(imgicon.getImage());
frm.setSize(100, 100);
frm.setVisible(true);
}
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
}
and here is the downloader:
import java.awt.GridLayout;
import java.io.BufferedInputStream;
imp...
Coarse-grained vs fine-grained
...an example, you will understand easily.
Fine-grained: For example, I have 100 services like findbyId, findbyCategry, findbyName...... so on. Instead of that many services why we can not provide find(id, category, name....so on). So this way we can reduce the services. This is just an example, but t...
Is there are way to make a child DIV's width wider than the parent DIV using CSS?
...ution that keeps the child element in the document flow:
.child {
width: 100vw;
position: relative;
left: calc(-50vw + 50%);
}
We set the width of the child element to fill the entire viewport width, then we make it meet the edge of the screen by moving it to the left by a distance of half th...
XXX.cc:100: error: ‘::strerror’ has not been declared - C/C++ - 清泛网 - 专注C/C++及内核技术
XXX.cc:100: error: ‘::strerror’ has not been declared#include <string.h>解决。#include <string.h> 解决。strerror