Checking if string is empty in Kotlin

Don’t use myString == "", in java this would be myString.equals("") which also isn’t recommended.

isBlank is not the same as isEmpty and it really depends on your use-case.

isBlank checks that a char sequence has a 0 length or that all indices are white space. isEmpty only checks that the char sequence length is 0.

/**
 * Returns `true` if this string is empty or consists solely of whitespace characters.
 */
public fun CharSequence.isBlank(): Boolean = length == 0 || indices.all { this[it].isWhitespace() }


/**
 * Returns `true` if this char sequence is empty (contains no characters).
 */
@kotlin.internal.InlineOnly
public inline fun CharSequence.isEmpty(): Boolean = length == 0