Remove trailing zeros in Kotlin

strings.xml

<resources>
    <string name="int_format">%1$,d</string>
    <string name="float_format">%1$,f</string>
</resources>

StringUtils.kt

object StringUtils {
    fun format(context: Context?, value: Float?): String? {
        return trimZero(context?.resources?.getString(R.string.float_format, value ?: 0f))
    }

    fun format(context: Context?, value: Int?): String? {
        return trimZero(context?.resources?.getString(R.string.int_format, value ?: 0))
    }

    fun trimTrailingZero(value: String?): String? {
        return if (!value.isNullOrEmpty()) {
            if (value!!.indexOf(".") < 0) {
                value

            } else {
                value.replace("0*$".toRegex(), "").replace("\\.$".toRegex(), "")
            }

        } else {
            value
        }
    }
}