From da78a9e329e272dedb2400b79a3bdeebff387d47 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:42:17 -0500 Subject: initial commit --- .../global_objects/string/repeat/index.html | 113 +++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 files/ko/web/javascript/reference/global_objects/string/repeat/index.html (limited to 'files/ko/web/javascript/reference/global_objects/string/repeat/index.html') diff --git a/files/ko/web/javascript/reference/global_objects/string/repeat/index.html b/files/ko/web/javascript/reference/global_objects/string/repeat/index.html new file mode 100644 index 0000000000..8e1d67988b --- /dev/null +++ b/files/ko/web/javascript/reference/global_objects/string/repeat/index.html @@ -0,0 +1,113 @@ +--- +title: String.prototype.repeat() +slug: Web/JavaScript/Reference/Global_Objects/String/repeat +translation_of: Web/JavaScript/Reference/Global_Objects/String/repeat +--- +
{{JSRef}}
+ +

repeat() 메서드는 문자열을 주어진 횟수만큼 반복해 붙인 새로운 문자열을 반환합니다.

+ +

구문

+ +
str.repeat(count);
+ +

매개변수

+ +
+
count
+
문자열을 반복할 횟수. 0과 양의 무한대 사이의 정수([0, +∞)).
+
+ +

반환값

+ +

현재 문자열을 주어진 횟수만큼 반복해 붙인 새로운 문자열.

+ +

예외

+ + + +

예제

+ +
'abc'.repeat(-1);   // RangeError
+'abc'.repeat(0);    // ''
+'abc'.repeat(1);    // 'abc'
+'abc'.repeat(2);    // 'abcabc'
+'abc'.repeat(3.5);  // 'abcabcabc' (count will be converted to integer)
+'abc'.repeat(1/0);  // RangeError
+
+({ toString: () => 'abc', repeat: String.prototype.repeat }).repeat(2);
+// 'abcabc' (repeat() is a generic method)
+
+ +

폴리필

+ +

repeat은 ECMAScript 2015 명세에 추가됐습니다. 따라서 어떤 표준 구현체에서는 사용할 수 없을 수도 있습니다. 그러나 아래 코드를 포함하면 지원하지 않는 플랫폼에서도 repeat을 사용할 수 있습니다.

+ +
if (!String.prototype.repeat) {
+  String.prototype.repeat = function(count) {
+    'use strict';
+    if (this == null) {
+      throw new TypeError('can\'t convert ' + this + ' to object');
+    }
+    var str = '' + this;
+    count = +count;
+    if (count != count) {
+      count = 0;
+    }
+    if (count < 0) {
+      throw new RangeError('repeat count must be non-negative');
+    }
+    if (count == Infinity) {
+      throw new RangeError('repeat count must be less than infinity');
+    }
+    count = Math.floor(count);
+    if (str.length == 0 || count == 0) {
+      return '';
+    }
+    // Ensuring count is a 31-bit integer allows us to heavily optimize the
+    // main part. But anyway, most current (August 2014) browsers can't handle
+    // strings 1 << 28 chars or longer, so:
+    if (str.length * count >= 1 << 28) {
+      throw new RangeError('repeat count must not overflow maximum string size');
+    }
+    var maxCount = str.length * count;
+    count = Math.floor(Math.log(count) / Math.log(2));
+    while (count) {
+       str += str;
+       count--;
+    }
+    str += str.substring(0, maxCount - str.length);
+    return str;
+  }
+}
+ +

명세

+ + + + + + + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName('ES2015', '#sec-string.prototype.repeat', 'String.prototype.repeat')}}{{Spec2('ES2015')}}Initial definition.
{{SpecName('ESDraft', '#sec-string.prototype.repeat', 'String.prototype.repeat')}}{{Spec2('ESDraft')}} 
+ +

브라우저 호환성

+ + + +

{{Compat("javascript.builtins.String.repeat")}}

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