fix furigana for known working sentence

1 files changed, 17 insertions, 0 deletions

diff --git a/util/string.ts b/util/string.ts
index 934963e..bb6bc0f 100644
--- a/util/string.ts
+++ b/util/string.ts
@@ -43,6 +43,12 @@ declare global {
 		 * @param position  index to search from (0 by default = start of string)
 		 */
 		cmpLen(searchString: string, position?: number): number;
+
+		/** @summary remove `length` characters from end of string */
+		removeEnd(length: number): string;
+
+		/** @summary replace last instance of `searchString` with `replaceValue` */
+		replaceLast(searchString: string, replaceValue: string): string;
 	}
 }
 
@@ -129,7 +135,18 @@ String.prototype.cmpLen = function(searchString, position = 0) {
 	for (let i = 0; i < searchString.length; i++) {
 		if (i + position >= this.length) break;
 		if (this[i + position] == searchString[i]) len++;
+		else break;
 	}
 	return len;
 }
 
+String.prototype.removeEnd = function(length) {
+	return this.substring(0, this.length - length);
+}
+
+String.prototype.replaceLast = function(find, replace) {
+	var i = this.lastIndexOf(find);
+	if (i == -1) return this as string; // not found
+	return this.substring(0, i) + replace + this.substring(i + find.length);
+}
+