Created
March 12, 2017 16:58
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Array methods
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| function forEach(arr, func){ | |
| "use strict"; | |
| for (var i=0, len = arr.length; i<len; i++){ | |
| arr[i] = func(arr[i]); | |
| } | |
| } | |
| function every(arr, func){ | |
| "use strict"; | |
| var res = null; | |
| for (var i=0, len = arr.length; i<len; i++){ | |
| res = res && func(arr[i]); | |
| } | |
| return res; | |
| } | |
| function some(arr, func){ | |
| "use strict"; | |
| var res = null; | |
| for (var i=0, len = arr.length; i<len; i++){ | |
| res = res || func(arr[i]); | |
| } | |
| return res; | |
| } |
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function forEach(arr, func){
"use strict";
for (var i=0, len = arr.length; i<len; i++){
arr[i] = func(arr[i]);
}
}
function every(arr, func){
"use strict";
var res = null;
for (var i=0, len = arr.length; i<len; i++){
res = res && func(arr[i]);
}
return res;
}
function some(arr, func){
"use strict";
var res = null;
for (var i=0, len = arr.length; i<len; i++){
res = res || func(arr[i]);
}
return res;
}
function map(arr, func){
"use strict";
var res = [];
for (var i=0, len = arr.length; i<len; i++){
res[i] = func(arr[i]);
}
return res;
}
function filter(arr, func){
"use strict";
var res = [];
for (var i=0, len = arr.length; i<len; i++){
if (func(arr[i]) === true){
res.push(arr[i]);
}
}
return res;
}