LastIndexOf(String, Int32, Int32, StringComparison) 报告此实例中指定字符串的最后一个匹配项的从零开始的索引位置。 搜索从指定的字符位置开始,然后向后向向字符串开头的指定字符位置。 参数指定搜索指定字符串时要执行的比较类型。 LastIndexOf(String, Int32, Int32) 报告此实例中指定字符串的最后一个匹...
所有主要浏览器都支持 lastIndex 属性。 实例 实例 在字符串中全局试试子字符串 "ain" , 并输出匹配完成之后的 lastIndex 属性:: varstr="The rain in Spain stays mainly in the plain";varpatt1=/ain/g;while(patt1.test(str)==true){document.write("'ain' found. Index now at:"+patt1.lastInde...
funcLastIndexByte(sstring,cbyte)int LastIndexByte returns the index of the last instance of c in s, or -1 if c is not present in s. LastIndexByte返回s中c的最后一个实例的索引,如果s中不存在c,则返回-1。 例子 packagemainimport("fmt""strings")funcmain(){fmt.Println(strings.LastIndexByte...
int IndexOf(char value, int startIndex, int count) (2)定位子串: int IndexOf(string value) int IndexOf(string value, int startIndex) int IndexOf(string value, int startIndex, int count) 在上述重载形式中,其参数含义如下: value:待定位的字符或者子串。 startIndex:在总串中开始搜索的其实位置。
</blockquote> is true. In either case, if no such character occurs in this string, then-1is returned. TheStringis searched backwards starting at the last character. Java documentation forjava.lang.String.lastIndexOf(int). Portions of this page are modifications based on work created and shar...
That is, the first character in the string is at index zero and the last is at Length - 1. This method begins searching at the last character position of this instance and proceeds backward toward the beginning until either value is found or the first character position has been examined. ...
LastIndexOf(Char, Int32, Int32) Reports the zero-based index position of the last occurrence of the specified Unicode character in a substring within this instance. The search starts at a specified character position and proceeds backward toward the beginning of the string for a specified numbe...
A result value of -1 indicates // the string was not found. // Search using different values of StringComparsion. Specify the start // index and count. Console.WriteLine("Part 1: Start index and count are specified."); foreach (StringComparison sc in scValues) { loc = cat.LastIndex...
LastIndexOfAny(Char[]) 來源: String.Searching.cs 報告Unicode 陣列中的一或多個指定的字元,在這個執行個體中最後一次出現時的所在索引 (以零為起始)。 C# 複製 public int LastIndexOfAny (char[] anyOf); 參數 anyOf Char[] Unicode 字元陣列,含有一或多個要搜尋的字元。 傳回 Int32 這個...
// 因为indexOf 只能查找到第一个,所以后面的查找,一定是当前索引加1,从而继续查找 varstr ="oabcoefoxyozzopp"; varindex = str.indexOf('o'); varnum =0; // console.log(index); while(index !== -1) { console.log(index);// 0 4 7 10 13 ...