带有变量的 Javascript 正则表达式提取

Question

我想从下面的键中提取值:作为单个字符串发送的值对:

"var1:value1,var2:value2,var3:value3"

我必须使用 JavaScript，不幸的是我无法使用数组并循环遍历 var1、var2、var3 键，因为正则表达式无法处理变量……我想知道是否有办法在JS?

见下文:

function onBefore(current, previous) 
{
if (current.key != '' || current.key != null) 
{
    if (current.key.match(/var1/)) {
    var assign = current.key.match(/(?:var1:)([^,]+)/)[1];
    } else if (current.key.match(/var2/)) {
    var assign = current.key.match(/(?:var2:)([^,]+)/)[1];
    } else if (current.key.match(/var3/)) {
    var assign = current.key.match(/(?:var3:)([^,]+)/)[1];
    } else if (current.key.match(/var4/)) {
    var assign = current.key.match(/(?:var4:)([^,]+)/)[1];
    }
    } else {
        assign = "None";
    }
    if (assign != "None") {
    current.node = assign;
    }
}
}

@revo 感谢您的回答，让其他人受益...这是最终代码:

	var str = "keyIcareabout:test3end,something:value,nothing:burger";
	var node = "None";
	
	function valueOf(key) {
    return (m = (new RegExp("\\b" + key + ":([^,]+)")).exec(str)) !== null ? m[1] : null;
	}
	
	if (str != '' || str !== null) 
	{
		var resources = ["keyIcareabout","somethingelseIcareabout"];
		
		for (i = 0; i < resources.length; i++) 
		{
			if (str.match(resources[i])) 
			{
				node = valueOf(resources[i]);
			}
		}
		
	}
	
	if (node != "None") 
	{
		console.log("Matched " + node + " with node field ");
	}

Answer 1

使用String.split:

const data = 'var1:value1,var2:value2,var3:value3';
const pairStrings = data.split(/,/g);
const pairs = pairStrings.map(pairString => pairString.split(/:/));
const object = pairs.reduce((object, [key, value]) => {
  object[key] = value;
  return object;
}, {});

console.log(object);