Javascript 如何像c#一样在angularjs中编写字符串格式？
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How to Write string format in angularjs like as c#?
提问by durga siva kishore mopuru
This is my code
这是我的代码
$http.get("/Student/GetStudentById?studentId=" + $scope.studentId + "&collegeId=" + $scope.collegeId)
.then(function (result) {
});
In the above code use http service for get student details based on id. but i want to write the above service string.format like in c#.net
在上面的代码中，使用 http 服务根据 id 获取学生详细信息。但我想像在 c#.net 中一样编写上述服务 string.format
(eg:- string.format("/Student/GetStudentById/{0}/collegeId/{1}",studentId,collegeId)
采纳答案by durga siva kishore mopuru
String.format = function () {
// The string containing the format items (e.g. "{0}")
// will and always has to be the first argument.
var theString = arguments[0];
// start with the second argument (i = 1)
for (var i = 1; i < arguments.length; i++) {
// "gm" = RegEx options for Global search (more than one instance)
// and for Multiline search
var regEx = new RegExp("\{" + (i - 1) + "\}", "gm");
theString = theString.replace(regEx, arguments[i]);
}
return theString;
}
$http.get(String.format("/Student/GetStudentById?studentId={0}&collegeId={1}", $scope.studentId , $scope.collegeId))
.then(function (result) {
});
回答by kriznaraj
Try this,
尝试这个，
String.format = function(str) {
var args = arguments;
return str.replace(/{[0-9]}/g, (matched) => args[parseInt(matched.replace(/[{}]/g, ''))+1]);
};
string.format("/Student/GetStudentById/{0}/collegeId/{1}",studentId,collegeId)
回答by vadi taslim
It's where Rest parametercomes in handy in ES6. And, this is yet another JS alternative for String.Formatas in C#.
它Rest parameter在 ES6 中派上用场。而且，这是String.FormatC# 中的另一种 JS 替代方案。
String.prototype.format = function(...args) {
let result = this.toString();
let i = 0;
for (let arg of args) {
let strToReplace = "{" + i++ + "}";
result = result.replace(strToReplace, (arg || ''));
}
return result;
}
E.g.
例如
var path = "/Student/GetStudentById/{0}/collegeId/{1}";
var studentId = "5";
var collegeId = "10";
var result = path.format(studentId, collegeId);
console.log(result);
This outputs,
这输出，
/Student/GetStudentById/5/collegeId/10
/Student/GetStudentById/5/collegeId/10
