Read the spaces and line breaks in the txt file

Answer 1

In Python, when you use the built-in function open() to open a txt-file, it will return the contents of the file as a string by default. At this time, the spaces and newlines in the txt-file will be retained correctly. For example, if there was a file named text.txt:
Hello
world!
How are you?
Read it using the following code:
```python
with open("text.txt", "r") as f:
content = f.read()
```
At this point, the spaces and line breaks in the original text in the string contained in the content variable are preserved.

If you want to deal with spaces and line breaks, there are two situations:
- ** Remove spaces and line breaks **: You can use the replace() method for strings. This method accepts two parameters. The substring to be replaced is the first argument, and the string to be replaced is the second argument. For operations that remove spaces and line breaks, replace them with an empty string. For example:
```python
with open("text.txt", "r") as f:
content = f.read().replace(" ", "").replace("\n", "")
print(content)
```
The output was: Hello world! Howareyou?。
- ** Preserve spaces and line breaks **: Similarly, use the replace() method of strings and pass the empty string as the second argument to the replace() method. For example:
```python
with open("text.txt", "r") as f:
content = f.read().replace("\n", "").replace(" ", " ")
print(content)
```
The output is: Hello world! How are you?，This is to replace the line break with an browser tag., spaces were replaced  with the original format.

In addition, you can also read the txt-file and process the spaces and line breaks in it in javelin, for example:
```javascript
function load(name) {
let xhr = new XMLHttpRequest(),
okStatus = document.location.protocol === "file:"? 0 : 200;
xhr.open('GET', name, false);
xhr.overrideMimeType("text/ml;charset= utf-8");//default is utf - 8
xhr.send(null);
return xhr.status === okStatus? xhr.responseText : null;
}

function write(str) {
var newStr = str.replace(/\s+/g, '\n');
console.log(newStr);
document.getElementById("text").innerHTML = newStr;
}

var text = load("test.txt");
write(text);
```
In the above code, you use the XMTPRequest object to read the contents of the txt-file, and then use the replace() method to replace multiple consecutive white space characters (including spaces, tabs, newlines, etc.) with a single newline.
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