Regular expression - Regex
Return to Text Handling, Character Handling, String Handling, Regex, Search and Replace, Text editors
https://www.youtube.com/watch?v=gd5uJ7Nlvvo
See: java.util.regex, java.text
https://www.oracle.com/technical-resources/articles/java/regex.html
There is nothing better for massive big data text file data cleaning via bulk search and replace with Regex than EmEditor:
Cloud Monk's Review of the Buggy and Way Overly Complicated Text Editor to AVOID called EmEditor.
SO BUGGY!!! I no longer recommend this product due to numerous keyboard shortcut bugs that the author refuses to fix even after I spend 5 hours documenting them in several emails. His English is very poor so he doesn’t understand what I say. And then asks me to re-explain it differently. Ugh!
It is fine for mouse only use, but if you use only the keyboard and the standard Windows editing keyboard shortcuts, you will be very frustrated.
Yutaka Emura is creator of this very overly complicated text editor. I highly recommend to AVOiD it if you use keyboard shortcuts instead of constantly mousing.
Notepad Plus Plus is FAR superior.
https://stackoverflow.com/questions/159521/text-editor-to-open-big-giant-huge-large-text-files
The author is horrible at creating bugs, fixing them and then reintroducing the same bugs again over several years. This is developer Yutaka Emura.
OLD REVIEW:
- “EmEditor is so good, I would gladly pay $300 per year for it. People pay Microsoft that much for MS Word. Having tested more than 30 different editors, I can say it is the fastest text editor on the planet! I use it for editing massively large text files for big data (huge data) and data science since it has extremely fast multi-threaded search and replace that allows me to use only keyboard shortcuts rather than the mouse. Due to the multi-threaded superfast saves I can quickly get back to editing.”
A regular expression (shortened as regex or regexp; also referred to as rational expression) is a sequence of characters that define a search pattern. Usually such patterns are used by string-searching algorithms for “find” or “find and replace” operations on strings, or for input validation. It is a technique developed in theoretical computer science and formal language theory.
- Snippet from Wikipedia: Regular expression
A regular expression (shortened as regex or regexp), sometimes referred to as rational expression, is a sequence of characters that specifies a match pattern in text. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation. Regular expression techniques are developed in theoretical computer science and formal language theory.
The concept of regular expressions began in the 1950s, when the American mathematician Stephen Cole Kleene formalized the concept of a regular language. They came into common use with Unix text-processing utilities. Different syntaxes for writing regular expressions have existed since the 1980s, one being the POSIX standard and another, widely used, being the Perl syntax.
Regular expressions are used in search engines, in search and replace dialogs of word processors and text editors, in text processing utilities such as sed and AWK, and in lexical analysis. Regular expressions are supported in many programming languages. Library implementations are often called an "engine", and many of these are available for reuse.
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