英文:
How to replace different possible substrings (maybe even of different lengths) with a single substring?
问题
# Python
import re
input_string = "blahblahblahrgb(123, 214, 255)blahblahrgb(99, 0, 235)aefubaeofbiuaebfaef"
output_string = re.sub(r'rgb\(\d+,\s*\d+,\s*\d+\)', 'rgb(255, 255, 255)', input_string)
// JavaScript
let inputString = "blahblahblahrgb(123, 214, 255)blahblahrgb(99, 0, 235)aefubaeofbiuaebfaef";
let outputString = inputString.replace(/rgb\(\d+,\s*\d+,\s*\d+\)/g, 'rgb(255, 255, 255)');
// Java
import java.util.regex.*;
public class Main {
public static void main(String[] args) {
String inputString = "blahblahblahrgb(123, 214, 255)blahblahrgb(99, 0, 235)aefubaeofbiuaebfaef";
String outputString = inputString.replaceAll("rgb\\(\\d+,\\s*\\d+,\\s*\\d+\\)", "rgb(255, 255, 255)");
}
}
// Dart
void main() {
String inputString = "blahblahblahrgb(123, 214, 255)blahblahrgb(99, 0, 235)aefubaeofbiuaebfaef";
String outputString = inputString.replaceAllMapped(
RegExp(r'rgb\(\d+,\s*\d+,\s*\d+\)'),
(match) => 'rgb(255, 255, 255)'
);
}
以上是在不同编程语言中实现替换的代码。
英文:
Suppose I have a huge string in following format -
"blahblahblahrgb(123, 214, 255)blahblahrgb(99, 0, 235)aefubaeofbiuaebfaef"
And I want to replace each instance of "rgb(x,x,x)" with "rgb(255,255,255)", with rest of the cahracters in string left intact. I can't use default string replace method as values inside rgb() can vary.
So the above string should become -
"blahblahblahrgb(255, 255, 255)blahblahrgb(255, 255, 255)aefubaeofbiuaebfaef"
Is there a default function to do that? or any efficient logic you can suggest?
Python, Javascript, Java, Dart or any language would do.
答案1
得分: 3
你的问题是正则表达式的一个完美用例。由于你要求使用多种语言，这里有一个 Python 正则表达式版本。
import re
rex = re.compile("rgb\(\d{1,3}, \d{1,3}, \d{1,3}\)")
myString = "blahblahblahrgb(123, 214, 255)blahblahrgb(99, 0, 235)aefubaeofbiuaebfaef"
newString = rex.sub("rgb(255, 255, 255)", mystring)
print(myString)
>>> blahblahblahrgb(123, 214, 255)blahblahrgb(99, 0, 235)aefubaeofbiuaebfaef
print(newString)
>>> blahblahblahrgb(255, 255, 255)blahblahrgb(255, 255, 255)aefubaeofbiuaebfaef
详细的正则表达式解释可以参考 Regex101。
英文:
Your problem is a perfect usecase for Regular Expressions.
Since you asked for multiple languages, here is a python regex version.
import re
rex = re.compile("rgb\(\d{1,3}, \d{1,3}, \d{1,3}\)")
myString = "blahblahblahrgb(123, 214, 255)blahblahrgb(99, 0, 235)aefubaeofbiuaebfaef"
newString = rex.sub("rgb(255, 255, 255)", mystring)
print(myString)
>>> blahblahblahrgb(123, 214, 255)blahblahrgb(99, 0, 235)aefubaeofbiuaebfaef
print(newString)
>>> blahblahblahrgb(255, 255, 255)blahblahrgb(255, 255, 255)aefubaeofbiuaebfaef
See Regex101 for a step by step explanation of the regex.
答案2
得分: 2
这是一个在Java中的快速正则表达式解决方案
public String replaceAllRGBToWhite(String str) {
return str.replaceAll("rgb\\\\(\\\\d{1,3}, \\\\d{1,3}, \\\\d{1,3}\\\\)", "rgb(255, 255, 255)");
}
英文:
Here is a quick regex solution in Java
public String replaceAllRGBToWhite(String str) {
return str.replaceAll("rgb\\(\\d{1,3}, \\d{1,3}, \\d{1,3}\\)", "rgb(255, 255, 255)");
}
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