As a developer, I can use String extensions in effective way

[hoangnguyen92dn]

Why

There are 2 extension to validate a valid string to reduce the ! in the if-condition block

fun String?.isNotNullOrEmpty(): Boolean = !this.isNullOrEmpty()

fun String?.isNotNullOrBlank(): Boolean = !this.isNullOrBlank()

Even the validation result is true, the develop still has to add the fallback value

val name: String = if (name.isNotNullOrEmpty()) {
    name // 🚫 IDE error due Type mismatch. Required: String Found: String?
}

The idea is building the extension with contract to tackle this issue

fun String?.isNotNullOrEmpty(): Boolean {
    contract {
        returns(false) implies (this@isNotNullOrEmpty != null)
    }
    return !this.isNullOrEmpty()
}

Reference:

• https://kt.academy/article/ak-contracts

Who Benefits?

Describe who will be the beneficiaries e.g. everyone, specific chapters, clients...