Ruby regex that does not match if there are keywords that you don’t want included in the string



Hello everyone it’s me candle. In this time I would like to create a regular expression that does not pass if keywords that I do not want included in the string match.

This is such case like this. For example, the regex matches these words “Bitcoin” and “Bitcoin ~” but doesn’t match “BitcoinCash” and “Bitcoin Cash”.

○ Bitcoin
○ Bitcoin Core
× BitcoinCash
× Bitcoin Cash



Write the regex

This is a regex that does not match if there are keywords that you do not want included in the string.

 /Keyword to include(?!Keywords you do not want included)/

For example, if you want to match “Bitcoin” and “Bitcoin ~” and exclude “Bitcoin Cash” and “Bitcoin Cash”, it looks like this. |OR and \sspace symbols are mixed.

reg = /Bitcoin(?!Cash|\sCash)/

This is the sample code.

name1 = "Bitcoin"
name2 = "Bitcoin Core"
name3 = "BitcoinCash"
name4 = "Bitcoin Cash"

reg = /Bitcoin(?!Cash|\sCash)/

if name1 =~ reg
  p name1

if name2 =~ reg
  p name2

if name3 =~ reg
  p name3

if name4 =~ reg
  p name4


I think that it is really easy once you know a regular expression, but it will be quite hard before you figure it out.


If you think this article is good, share it please




Your email address will not be published. Required fields are marked *


4 functions of scikit-learn preprocesses data such as machine learning

Abstract Hello every one this is candle. In this time we will prreprocess a data with scikit-learn which is machine learning library of python. We will use scikit-learn called With scikit-learn you can use what is called a converter, and you can convert the input data with fit_transform () method.Since there are many converters, I will introduce the following four converters that are often used in machine learning. Imputer StandardScaler MinMaxScaler OneHotEncorder Condition Python3 scikit-learn 0.19.1 For running sample code, you need numpy aside from these libs.

Customize wordpress bogo plugin’s short code

English 日本語 Abstract Hello everyone, It’s me candle. In this time, I will show you how to customize wordpress bogo short code. The items to introduce are these. The flag display or hide Change the text Related article How to change the language form “en-US” to “en” by wordpres bogo Precondition WordPress bogo has been installed You can edit the theme of wordpress

I created docker shortcut command with bash alias

Abstract Hello everyone it’s me candle. I will introduce easy operation of the docker command. Of course, I just created it thinking that it was useful, so please change it for much more useful. Precondition You use bash. ( Even though you use zsh or csh or something else, you edit a bit, it will work well) You use docker

Create plantUML with emacs using plantuml-mode

Autumn leaves on wood table Abstract Hello everyone it’s me candle. In this time, we will introduce plantuml-mode of emacs supporting plantUML. plantuml-mode has three functions. Syntax highlight Autocomplete Display UML preview There are plenty of settings, so let’s do it patiently. Precondition You had plantuml command I installed plantuml with brew. but it is ok you prepare jar file. If you don’t have it yet, please refer to here. Build PlantUML environment on Mac using brew Install plantuml-mode The latest version of plant-mode is not yet registered in el-get packages, so we will get it from github directly. For …

Hiragino Sans How to write to change weight in css

Abstract Hello everyone it’s me candle. In this time I will show you how to write css of Hiragino Sans.The feature of Hiragino Sans is to be able to change the weight of font from 1 to 9 levels. On the other hand, there are various ways of writing css of Hiragino Sans and I did not know exactly how to write it, so I wrote a program and test it. It will help you who will use Hiragino Sans. The quick reference is released here. Condition Nothing SPONSORED LINK How to write css of Hiragino Sans From the …

I work in the venture company as a CTO. I start to write program in University, first I learned java, C++ and PHP. In the company, I'm developing web services by Rails. I do like to automation.