replace - w3toppers.com

What is the equivalent of Regex-replace-with-function-evaluation in Java 7?

Your answer is in the Matcher#appendReplacement documentation. Just put your function call in the while loop. [The appendReplacement method] is intended to be used in a loop together with the appendTail and find methods. The following code, for example, writes one dog two dogs in the yard to the standard-output stream: Pattern p = Pattern.compile(“cat”); … Read more

How to replace first occurrence of string in Java

You can use replaceFirst(String regex, String replacement) method of String.

Replace all values in a matrix

Replace a value NA with the value from another column in R

Passing a function to Powershell’s (replace) function

Perhaps you are looking for Regex.Replace Method (String, MatchEvaluator). In PowerShell a script block can be used as MatchEvaluator. Inside this script block $args[0] is the current match. $global_counter = 0 $callback = { $global_counter += 1 “string-$($args[0])-” + $global_counter } $re = [regex]”match” $re.Replace(‘zzz match match xxx’, $callback) Output: zzz string-match-1 string-match-2 xxx

Using get() with replacement functions

To understand why this doesn’t work, you need to understand what colnames<- does. Like every function in that looks like it’s modifying an object, it’s actually modifying a copy, so conceptually colnames(x) <- y gets expanded to: copy <- x colnames(copy) <- y x <- copy which can be written a little more compactly if … Read more

How to search and replace with a counter-based expression in Vim?

It is possible to have a counter using the substitute-with-an-expression feature (see :help sub-replace-\=). Unfortunately, since the \= construct allows only expressions, the :let command cannot be used, and therefore, a variable cannot not be set the usual way. However, there is a simple trick to change the value of a variable in expression if that variable … Read more

Replacing occurrences of a number in multiple columns of data frame with another value in R

you want to search through the whole data frame for any value that matches the value you’re trying to replace. the same way you can run a logical test like replacing all missing values with 10.. data[ is.na( data ) ] <- 10 you can also replace all 4s with 10s. data[ data == 4 … Read more

Most efficient way to use replace multiple words in a string [duplicate]

This functionality is already implemented in Commons Lang‘s StringUtils class. StringUtils.replaceEach(String text, String[] searchList, String[] replacementList)