在C语言中,String.indexOf函数并不存在。String类型和indexOf函数是Java中的概念。在C语言中,字符串通常是以字符数组或字符指针表示的。要在C语言中查找一个字符串中的子字符串,可以使用strstr函数。 strstr函数是C语言标准库string.h中的一个函数,它的原型如下: ...
IndexOf(String, Int32, Int32, StringComparison) Gibt den NULL-basierten Index des ersten Vorkommens der angegebenen Zeichenfolge im aktuellen String-Objekt an. Parameter geben die Anfangssuchposition in der aktuellen Zeichenfolge, die Anzahl der Zeichen in der aktuellen Zeichenfolge und den ...
C#中的IndexOf方法区分大小写。但是,您可以使用CompareInto类使其对大小写不敏感。 代码如下: stringfirstString ="What a day this has been!";stringsecondString ="Day"; CompareInfo sampleCInfo=CultureInfo.InvariantCulture.CompareInfo;intindex = sampleCInfo.IndexOf(firstString, secondString, CompareOptions...
The character'a'occurs multiple times in the"Learn Java"string. TheindexOf()method returns the index of the first occurrence of'a'(which is 2). If the empty string is passed,indexOf()returns 0 (found at the first position. It is because the empty string is a subset of every substring...
static String valueOf(char[] chs):将字符数组转换成字符串static String valueOf(int i):将整数转换成字符串String toLowerCase():将字符串所有字符小写String toUpperCase():将字符串所有字符大写String concat(String str):字符串拼接1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 ...
http://www.arduino.cc/en/Tutorial/StringIndexOf This example code is in the public domain. */ void setup() { // Open serial communications and wait for port to open: Serial.begin(9600); while (!Serial) { ; // wait for serial port to connect. Needed for native USB port only ...
这时候你需要把s转换成string才可以运行。如以上回答未解决问题，请尝试：var parr = ["a","b","c","d"];判断parr 数组中是否存在a parr.indexOf("a")==-1 在ie8下会提示对象不支持indexOf属性或方法 解决办法：用jquery里的$.inArray替代indexOf .inArray(“a”, parr)==-1 ...
Our task is to find the last index of ch in the string. Suppose the string is “Hello”, and character ch = ‘l’, then the last index will be 3. To solve this, we will traverse the list from right to left, if the character is not same as ‘l’, then decrease index, if it...
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conststr="JavaScript is a programming language. JavaScript is widely used for web development.";constindex=str.indexOf("JavaScript");console.log(index);// Output: 0 As we can see, theindexOf()method returns the index of the first occurrence of "JavaScript" in the string, which is 0 in...