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Is it possible to use regex to find all words within a sentence that contains a substring?
Example:
var sentence = "hello my number is 344undefined848 undefinedundefined undefinedcalling whistleundefined";
I need to find all words in this sentence which contains 'undefined' and remove those words.
Output should be "hello my number is ";
FYI - currently I tokenize (javascript) and iterate through all the tokens to find and remove, then merge the final string. I need to use regex. Please help.
Thanks!
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Using the replace() function We can use the replace() function to remove word from string in Python. This function replaces a given substring with the mentioned substring. We can replace a word with an empty character to remove it. We can also specify how many occurrences of a word we want to replace in the function.
You can either use R base function gsub() or use str_replace() from stringr package to remove characters from a string or text.
The replace() method can be used in a TypeScript string to replace a particular substring or a match (regular expression) in a string. All we need to do is pass the substring or regular expression of the substring we want to replace.
The replace() method is one of the most commonly used techniques to remove the character from a string in javascript. The replace() method takes two parameters, the first of which is the character to be replaced and the second of which is the character to replace it with.
You can use:
str = str.replace(/ *\b\S*?undefined\S*\b/g, '');
It certainly is possible.
Something like start of word, zero or more letters, "undefined", zero or more letters, end of word should do it.
A word boundary is \b outside a character class, so:
\b\w*?undefined\w*?\b
using non-greedy repetition to avoid the letter matching tryig to match "undefined" and leading to lots of backtracking.
Edit switch [a-zA-Z] to \w because the example includes numbers in the "words".
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