如何将 2 个 javascript 变量组合成一个字符串
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How do I combine 2 javascript variables into a string
提问by Lenny Magico
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;
回答by Lightness Races in Orbit
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;
回答by Abdullah Ayd?n
var variable = 'variable',
another = 'another';
['I would', 'like to'].join(' ') + ' a js ' + variable + ' together with ' + another + ' to create ' + [another, ...[variable].concat('name')].join(' ').concat('...');
回答by Muneeb
ES6 introduce template strings for concatenation. Template Strings use back-ticks (``) rather than the single or double quotes we're used to with regular strings. A template string could thus be written as follows:
ES6 引入了用于连接的模板字符串。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。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!
回答by gion_13
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
回答by K0m1sh
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)
