Collection of extensions

Dart is good but can be better.

Kotlin Style

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For objects:

• let
• run
• also
• takeIf
• takeUnless

For strings:

• isBlank()
• isNotBlank()
• isNullOrBlank()
• orEmpty()

For iterable

• firstOrNull()
• lastOrNull()
• lastIndex
• getOrElse(int,defaultValue)
• getOrNull(int)
• mapIndexed(int,element)
• mapNotNull(element)
• firstOrNullIf(predicate)
• lastOrNullIf(predicate)
• forEachIndexed(index,element)
• joinToString

For List

• firstOrNullIf(predicate)
• lastOrNullIf(predicate)

For map

• getOrElse(key,defaultValue)

Other

Pair<F,S>