How to Avoid \'Out of Range\' Errors When Removing Elements from Go Struct Arrays in Loops?

Removing Elements from Struct Arrays in Loops in Go

Problem:
When removing elements from an array of structs within a loop, the "out of range" error may occur.

Solution:
To remove elements by key from an array of structs, it is recommended to use one of the following slicing tricks:

a = append(a[:i], a[i+1:]...)

or

a = a[:i+copy(a[i:], a[i+1:])]

Important Note:
If deleting elements from within the slice that is being looped over, it is crucial to use a downward loop to avoid skipping elements.

Modified Code:

// Your original loop with the issue:
// for i, application := range config.Applications {
//   if i == 1 {
//     config.Applications = _removeApplication(i, config.Applications)
//   }
// }

// Corrected code using downward loop:
for i := len(config.Applications) - 1; i >= 0; i-- {
    application := config.Applications[i]
    // Condition to decide if current element has to be deleted:
    if haveToDelete {
        config.Applications = append(config.Applications[:i],
                config.Applications[i+1:]...)
    }
}

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