[英]How do I combine 2 javascript variables into a string
I would like to join a js variable together with another to create another variable name... so it would be look like;我想将一个 js 变量与另一个变量连接在一起以创建另一个变量名......所以它看起来像;
for (i=1;i<=2;i++){
var marker = new google.maps.Marker({
position:"myLatlng"+i,
map: map,
title:"title"+i,
icon: "image"+i
});
}
and later on I have后来我有
myLatlng1=xxxxx;
myLatlng2=xxxxx;
Use the concatenation operator +
, and the fact that numeric types will convert automatically into strings:使用连接运算符
+
,以及数字类型将自动转换为字符串的事实:
var a = 1;
var b = "bob";
var c = b + a;
warning!警告! this does not work with links.
这不适用于链接。
var variable = 'variable', another = 'another'; var 变量 = '变量', 另一个 = '另一个';
['I would', 'like to'].join(' ') + ' a js ' + variable + ' together with ' + another + ' to create ' + [another, ...[variable].concat('name')].join(' ').concat('...');
ES6 introduce template strings for concatenation. ES6 引入了用于连接的模板字符串。 Template Strings use back-ticks (``) rather than the single or double quotes we're used to with regular strings.
模板字符串使用反引号 (``) 而不是我们习惯于使用常规字符串的单引号或双引号。 A template string could thus be written as follows:
因此,模板字符串可以写成如下:
// Simple string substitution
let name = "Brendan";
console.log(`Yo, ${name}!`);
// => "Yo, Brendan!"
var a = 10;
var b = 10;
console.log(`JavaScript first appeared ${a+b} years ago. Crazy!`);
//=> JavaScript first appeared 20 years ago. Crazy!
You can use the JavaScript String concat() Method,你可以使用 JavaScript String concat() 方法,
var str1 = "Hello ";
var str2 = "world!";
var res = str1.concat(str2); //will return "Hello world!"
Its syntax is:它的语法是:
string.concat(string1, string2, ..., stringX)
if you want to concatenate the string representation of the values of two variables, use the +
sign :如果要连接两个变量值的字符串表示形式,请使用
+
符号:
var var1 = 1;
var var2 = "bob";
var var3 = var2 + var1;//=bob1
But if you want to keep the two in only one variable, but still be able to access them later, you could make an object container:但是,如果您想将两者仅保留在一个变量中,但仍可以在以后访问它们,则可以创建一个对象容器:
function Container(){
this.variables = [];
}
Container.prototype.addVar = function(var){
this.variables.push(var);
}
Container.prototype.toString = function(){
var result = '';
for(var i in this.variables)
result += this.variables[i];
return result;
}
var var1 = 1;
var var2 = "bob";
var container = new Container();
container.addVar(var2);
container.addVar(var1);
container.toString();// = bob1
the advantage is that you can get the string representation of the two variables, bit you can modify them later :优点是您可以获得两个变量的字符串表示形式,稍后您可以修改它们:
container.variables[0] = 3;
container.variables[1] = "tom";
container.toString();// = tom3
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.