C++ – How to remove a particular substring from a string

c++stringsubstring

In my C++ program, I have the string

string s = "/usr/file.gz";

Here, how to make the script to check for .gz extention (whatever the file name is) and split it like "/usr/file"?

Best Solution

You can use erase for removing symbols:

str.erase(start_position_to_erase, number_of_symbols);

And you can use find to find the starting position:

start_position_to_erase = str.find("smth-to-delete");

Related Solutions

C# – the difference between String and string in C#

string is an alias in C# for System.String.
So technically, there is no difference. It's like int vs. System.Int32.

As far as guidelines, it's generally recommended to use string any time you're referring to an object.

e.g.

string place = "world";

Likewise, I think it's generally recommended to use String if you need to refer specifically to the class.

e.g.

string greet = String.Format("Hello {0}!", place);

This is the style that Microsoft tends to use in their examples.

It appears that the guidance in this area may have changed, as StyleCop now enforces the use of the C# specific aliases.

Bash – How to check if a string contains a substring in Bash

You can use Marcus's answer (* wildcards) outside a case statement, too, if you use double brackets:

string='My long string'
if [[ $string == *"My long"* ]]; then
  echo "It's there!"
fi

Note that spaces in the needle string need to be placed between double quotes, and the * wildcards should be outside. Also note that a simple comparison operator is used (i.e. ==), not the regex operator =~.

Best Solution

Related Solutions

C# – the difference between String and string in C#

This is the style that Microsoft tends to use in their examples.

Bash – How to check if a string contains a substring in Bash

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