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Fixed Levenshtein Distance function.

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Needed lowercase to pass tests of the function. In app strings are passed in lowercase.
This commit is contained in:
Sad Ellie 2022-12-08 12:37:58 +04:00
parent d544a959f0
commit 8bb5d72461
1 changed files with 5 additions and 4 deletions
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9
app/src/main/java/com/sadellie/unitto/screens/Utils.kt
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@ -171,18 +171,19 @@ fun openLink(mContext: Context, url: String) {
}
/**
* Compute Levenshtein Distance between this string and [stringB]. Doesn't matter which string is
* Compute Levenshtein Distance between this string and [secondString]. Doesn't matter which string is
* first.
*
* @return The amount of changes that are needed to transform one string into another
*/
fun String.lev(stringB: String): Int {
val stringA = this
fun String.lev(secondString: String): Int {
val stringA = this.lowercase()
val stringB = secondString.lowercase()
// Skipping computation for this cases
if (stringA == stringB) return 0
if (stringA.isEmpty()) return stringB.length
// This case is basically unreal in this app, because stringB is a unit name and they are never empty
// This case is basically unreal in this app, because secondString is a unit name and they are never empty
if (stringB.isEmpty()) return stringA.length
var cost = IntArray(stringA.length + 1) { it }