[英]How to break an infinite loop inside a function on keystroke in Node.js?
[英]How to break out of a for loop while inside of a function? (node.js)
我正在使用这个库: https : //github.com/NodeRedis/node_redis
这是我的代码示例:
var redis = require('redis');
var redisdb = redis.createClient(); //creates a new client
var multi = redisdb.multi();
redisdb.on('connect', function() {
console.log('connected to redis');
});
redisdb.flushdb(function(err, success) {
if (success) {
console.log('cleared redis DB');
}
});
redisdb.sadd("list", "list:1");
redisdb.sadd("list:1", "list:1:stuff:abc");
redisdb.sadd("list", "list:2");
redisdb.sadd("list", "list:3");
redisdb.sadd("list:3", "list:3:stuff:def");
redisdb.sadd("list", "list:4");
redisdb.sadd("list", "list:5");
redisdb.sadd("list", "list:6");
redisdb.sadd("list", "list:7");
redisdb.sadd("list", "list:8");
redisdb.sadd("list", "list:9");
redisdb.sadd("list", "list:10");
redisdb.sadd("list", "list:11");
redisdb.sadd("list", "list:12");
redisdb.sadd("list", "list:13");
redisdb.sadd("list", "list:14");
redisdb.sadd("list", "list:15");
var abc = function(value) {
console.log(value);
/*
returns:
[ 'list:3' ]
[ 'list:1' ]
*/
}
redisdb.smembers('list', function(err, mems) {
if (mems && mems.length > 0) {
for (var i = 0; i < mems.length; i++) {
redisdb.scard(mems[i], function(err, data) {
if (data > 0) {
abc(this.args); //would like it if the loop stopped here
}
});
}
}
});
我希望循环从我调用函数abc
的那一刻起停止。 因此,在这种情况下,它只会返回[ 'list:3' ]
。
我怎么能做到这一点?
谢谢
只需在您的 abc 通话后添加一个中断:
if (data > 0) {
abc(this.args)
break
}
break
将退出循环。
if (data > 0) {
abc(this.args); //would like it if the loop stopped here
return;
}
or
if (data > 0) {
abc(this.args); //would like it if the loop stopped here
i= mems.length; //Not a best practice
}
for(var i = 0, var found = false; i < Mena.index && found == false; i ++)
{
//your stuff...
if(data>0)
{
//your stuff...
found = true; //break
}
}
这是非常基本的算法内容,对于所有 c 语法编程语言都是类似的。 见http://www.w3schools.com/js/js_loop_for.asp
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