[Interest] Simple doubt on file i/o

[Arne Dirks]

On 06/27/2013 08:56 AM, Mandeep Sandhu wrote:
> get(key):
> * Open the file in Read-Only mode.
> * Parse the data and prepare a QMap of the key-value pairs.
> * Close the file
> * Return the value for the key
>
> set(key, value):
> * Open the file in Read-Only mode.
> * Parse the data and prepare a QMap of the key-value pairs.
> * Close the file
> * Open the file in Write-Only & Truncate mode
> * Insert the new key-value in the map
> * Write the map
> * Close the file

Is there a reason why you read the file every time you get/set 
something? Couldn't you read the file once during application startup, 
store the data in a map and only write it out again when your 
application terminates, provided anything has changed at all?
arne