160 If you want to replace multiple characters you can call the String.prototype.replace() with the replacement argument being a function that gets called for each match. All you need is an object representing the character mapping that you will use in that function.
The accepted answer to how to replace multiple strings together in Oracle suggests using nested REPLACE statements, and I don't think there is a better way. If you are going to make heavy use of this, you could consider writing your own function:
After some benchmarking on using replace several times vs regex replacement on a string of increasing length by power of 2 with 100 replacements added, it seems that on my computer this method is the slowest when the length of the string is lower than 500 characters, and the fastest otherwise.
I want to find all values in a Pandas dataframe that contain whitespace (any arbitrary amount) and replace those values with NaNs. Any ideas how this can be improved? Basically I want to turn thi...
As pointed out by michaelb958, you cannot replace in place with data of a different length because this will put the rest of the sections out of place. I disagree with the other posters suggesting you read from one file and write to another. Instead, I would read the file into memory, fix the data up, and then write it out to the same file in a separate step.
The function withColumn is called to add (or replace, if the name exists) a column to the data frame. The function regexp_replace will generate a new column by replacing all substrings that match the pattern.
Replace - Replace a substring using string substitution Description: To replace a substring with another string use the string substitution feature. The example shown here replaces all occurrences "teh" misspellings with "the" in the string variable str.
