easy-loop

쉬운 동기식 반복 처리 선택적 병렬처리

Comment

1) Method
    : 모두 같은 동작이며 편리한 메소드를 호출하세요.(All same)
    
    var loop = require('easy-loop');
    loop(arg1, arg2[, arg3, arg4]) == loop.for() == loop.while() == loop.loop()
    
2) Arguments	
    (1) Array or Object 	- require
    (2) process function 	- require
    (3) concurrency	number 	- option (default : 1)
    (4) callback function 	- option (default : nothing)

Examples

var loop = require('easy-loop');

var arr = [1,2,3,4,5];
console.log("Case1 Start => Array and 3 arguments");
console.log("Start : Now Second : ", new Date().getSeconds());
loop(arr, function(i, value, next){
    setTimeout(function(){
        console.log(i, "=>", value, " , Date : ", new Date().getSeconds());
        next();	//require
    }, 1000);
}, function(err){
    console.log("err : ", err);
    console.log("Case 1 result");
    console.log("Result : Now Second : ", new Date().getSeconds());
});
console.log("Case1 End => Array");

/* 결과(Result) - 5초 소요(run time : 5 second)
Case1 Start => Array and 3 arguments
Start : Now Second :  54
Case1 End => Array
0 '=>' 1 ' , Date : ' 55
1 '=>' 2 ' , Date : ' 56
2 '=>' 3 ' , Date : ' 57
3 '=>' 4 ' , Date : ' 58
4 '=>' 5 ' , Date : ' 59
err :  undefined
Case 1 result
Result : Now Second :  59
*/




var arr = [1,2,3,4,5];
console.log("Case2 Start => Array and 2 arguments");
loop.for(arr, function(i, value, next){
    setTimeout(function(){
        console.log(i, "=>", value);	
        next();		
    }, 1000);
});
console.log("Case2 End => Array and 2 arguments");

/* 결과(Result) - 5초 소요(run time : 5 second)
Case2 Start => Array and 2 arguments
Case2 End => Array and 2 arguments
0 '=>' 1
1 '=>' 2
2 '=>' 3
3 '=>' 4
4 '=>' 5
*/




var arr = [1,2,3,4,5];
console.log("Case3 Start => Array and error(or break) and 3 arguments");
loop.while(arr, function(i, value, next){
    setTimeout(function(){
        console.log(i, "=>", value);
        if(i === 2)	next("error or break");
        else		next();
    }, 1000);
}, function(err){
    console.log("err : ", err);
    console.log("Case 3 result");
});
console.log("Case3 End => Array and error(or break)");

/* 결과(Result) - 3초 소요(run time : 3 second)
Case3 Start => Array and error(or break) and 3 arguments
Case3 End => Array and error(or break)
0 '=>' 1
1 '=>' 2
2 '=>' 3
err :  error or break
Case 3 result
*/




var obj = {a:1,b:2,c:3,d:4,e:5};
console.log("Case4 Start => Object and 3 arguments");
loop.loop(obj, function(key, value, next){
    setTimeout(function(){
        console.log(key, "=>", value);
        next();
    }, 1000);
}, function(err){
    console.log("err : ", err);
    console.log("Case 4 result");
});
console.log("Case4 End => Object");

/* 결과(Result) - 5초 소요(run time : 5 second)
Case4 Start => Object and 3 arguments
Case4 End => Object
a => 1
b => 2
c => 3
d => 4
e => 5
err :  undefined
Case 4 result
*/





var arr = [];	// or {}
console.log("Case5 Start => Empty Array and 3 arguments");
loop(arr, function(i, value, next){
    setTimeout(function(){
        console.log(i, "=>", value);
        next();
    }, 1000);
}, function(err){
    console.log("err : ", err);
    console.log("Case5 result");
});
console.log("Case5 End => Empty Array");

/* 결과(Result) - 0초 소요(run time : 0 second)
Case5 Start => Empty Array and 3 arguments
err :  undefined
Case5 result
Case5 End => Empty Array
*/





var arr = [1,2,3,4,5];
console.log("Case6 Start => concurrency and 4 arguments");
console.log("Start : Now Second : ", new Date().getSeconds());
loop(arr, function(i, value, next){
    setTimeout(function(){
        console.log(i, "=>", value, " , Date : ", new Date().getSeconds());
        next();
    }, 1000);
}, 3, function(err){
    console.log("err : ", err);
    console.log("Case 6 result");
    console.log("Result : Now Second : ", new Date().getSeconds());
});
console.log("Case6 End => concurrency");

/* 결과(Result) - 2초 소요(run time : 2 second)
Case6 Start => concurrency and 4 arguments
Start : Now Second :  3
Case6 End => concurrency
0 '=>' 1 ' , Date : ' 4
1 '=>' 2 ' , Date : ' 4
2 '=>' 3 ' , Date : ' 4
3 '=>' 4 ' , Date : ' 5
4 '=>' 5 ' , Date : ' 5
err :  undefined
Case 6 result
Result : Now Second :  5
*/