notepad 正则变量运算
【中英文版】
英文文档：
正则匹配递增写法
Regular expressions are a powerful tool for string manipulation in programming.They are used to match and extract specific patterns of text from strings.In some programming languages, regular expressions can be combined with variables and operators to perform more complex operations.
One such language is Notepad, which allows users to write simple scripts to automate tasks.In Notepad, you can use regular expressions along with variables and operators to perform calculations and manipulate text.
For example, you can use the `=~` operator to perform a regular expression match and assign the result to a variable.You can also use the `++` and `--` operators to increment and decrement variables.Additionally, you can use mathematical operators like `+`, `-`, `*`, and `/` to perform calculations with variables.
Here"s an example of how you can use regular expressions, variables, and operators in Notepad:
```
let str = "Hello, World!"
let regex = /World/
let count = 0
for (let i = 0; i < str.length; i++) {
  if (str[i].match(regex)) {
    count++
  }
}
let result = "The word "World" appears " + count + " times in the string."
print(result)
```
In this example, we first define a string `str` and a regular expression `regex` to match the word "World".We then initialize a variable `count` to keep track of how many times the word "World" appears in the string.
We use a `for` loop to iterate through each character in the string and check if it matches the regular expression.If it does, we increment the `count` variable.
Finally, we use the `print` function to display the result, which is the number of times the word "World" appears in the string.
中文文档：
正则表达式是编程中用于字符串操作的强大工具。它们用于匹配和提取字符串中的特定模式。在一些编程语言中，正则表达式可以与变量和运算符结合使用，以执行更复杂的操作。
这样一个语言就是记事本，它允许用户编写简单的脚本来自动化任务。在记事本中，您可以使用正则表达式以及变量和运算符来执行计算和操纵文本。
例如，您可以使用 `=~` 运算符来执行正则表达式匹配并将结果分配给变量。您还可以使用 `++` 和 `--` 运算符来递增和递减变量。此外，您可以使用数学运算符如 `+`、`-`、`*` 和 `/` 来与变量执行计算。
下面是您如何在记事本中使用正则表达式、变量和运算符的一个例子：
```
let str = "Hello, World!"
let regex = /World/
let count = 0
for (let i = 0; i < str.length; i++) {
  if (str[i].match(regex)) {
    count++
  }
}
let result = "The word "World" appears " + count + " times in the string."
print(result)
```
在这个例子中，我们首先定义了一个字符串 `str` 和一个正则表达式 `regex` 来匹配单词 "World"。然后我们初始化一个变量 `count` 来跟踪单词 "World" 在字符串中出现的次数。
我们使用一个 `for` 循环来遍历字符串中的每个字符，并检查它是否与正则表达式匹配。如果它确实，我们就递增 `count` 变量。

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