9.在【制定的范围追加】字符串(插入字符串、替换字符串) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 NSString*aac=@"wwwbbbccc";NSRange ranges={4,0};NSString*aac1=[aac stringByReplacingCharactersInRange:ranges withString:@"aa"];NSLog(@"aac1: %@",aac1); 10.使用新的字符串【替换】...
How do you check if one string contains a substring in JavaScript?Craig Buckler
* When the intern method is invoked, if the pool already contains a * string equal to this {@code String} object as determined by * the {@link #equals(Object)} method, then the string from the pool is * returned. Otherwise, this {@code String} object is added to the * pool and ...
1functionisContains(str, substr) {2returnstr.indexOf(substr) >= 0;3} str为源字符串; substr为查找的字符; 返回true代表包含,false代表不包含。
In this example, the function returns true if the string contains any white space in it else it returns false Conclusion: So to detect any white space in a given string in Javascript we can use the regex test() method or the stringindexOf() method. Related Topics: How to check if Str...
Different methods to check if string contains spaces in JavaScript Method-1: UseindexOfmethod Not to be confused with the arrayindexOfmethod, theString.prototype.indexOf()takes a string argument and searches for it within the string it’s called upon and returns the index of the first occurren...
To check if a Javascript String Contains a substring or not, we can use 7 different Javascript methods as listed in below table.
varstr1="NaN means not a number. Infinity contains -Infinity and +Infinity in JavaScript.", str2="My grandfather is 65 years old and My grandmother is 63 years old.", str3="The contract was declared null and void."; str1.match("number");// "number" 是个字符串,返回["number"] ...
varre=/apples/gi;varstr="Apples are round, and apples are juicy.";if(str.search(re)==-1){console.log("Does not contain Apples");}else{console.log("Contains Apples");} 10.slice() 提取字符串的片断,并在新的字符串中返回被提取的部分。
A boolean.trueif the string contains the value, otherwisefalse. More Examples Start at position 12: lettext ="Hello world, welcome to the universe."; letresult = text.includes("world",12); Try it Yourself » Related Pages JavaScript Strings ...