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Here, I want to delete the strings of a file according to the line numer. Like in Figure testfile.jpg shown, the content of line 2(' hello world') will be deleted. And I used the following method (shown in attachment):
1. 'ReadAllTextFromFile', I read the content of file as the string;
2. 'String to Matrix', convert the string to matrix;
3. 'Custom- simple', find out the text which will be delete. Here the output dimension is vector;
4. 'Custom-Advanced', convert the output dimension from vector to string.
5. 'Search and Replace', using the empty string to repalce the deleted strings.
6 'WriteTextToFile', overwrite the old file with the new content.
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