小编Ale*_*x L的帖子

当出现像404这样的错误时,可以防止Wget生成输出文件.

我跑的时候

wget -O my.html http://sdfsdfdsf.sdfds

http://sdfsdfdsf.sdfds不存在,但Wget仍然创建my.html

我正在制作一个bash脚本,并希望确保它停止,如果wget无法获得有效的文件.

将树数据放入数组的有效方法是什么？

我按照sitepoint教程检索树数据.

但是,本教程仅显示如何输出树,而不是如何创建多个数组.

我用了

SELECT title, lft, rgt FROM tree_structure WHERE lft BETWEEN $parentLft  AND $parentRgt ORDER BY lft ASC

所以对于每个项目,我都有它的标题,左右值.

我坚持让阵列看起来像这样

Array
(
 Title: Main Topic
 Children => Array
             (
              => Title: subTopic
                     Leaf:  true
              => Title: Another subtopic
                     Children =>  Array
                               (
                                => Title: subtopic child
                                  Leaf: true
                               )
              ) 

)

如果你能提供帮助,我会非常感激.

PS.sql输出看起来像这样(除了我有标题,不是名称,不使用category_id):

+-------------+----------------------+-----+-----+
| category_id | name                 | lft | rgt |
+-------------+----------------------+-----+-----+
|           1 | ELECTRONICS          |   1 |  20 …

我有一个包含任务的节点的树.

已完成的任务具有属性状态:100和类cls:"已完成".

我想制作一个隐藏已完成任务的按钮.

什么函数会通过id或类隐藏树中的节点？

{"id":"45",
"description":"Pay bills",
"status":"100",
"cls":"done",
"uiProvider":"col",
"leaf":true}

当我改变场景时,此代码会创建一个随机转换.有十一个过渡.因为它们是静态的,我想我不能使用NSClassFromString.我还需要传递场景对象.现在,转换似乎是多余的.有没有办法重写这个以提高效率？

-(void) newScene
{
CCScene *s = [CCScene node];
id child = [sceneCharacter node];
[s addChild:child];
int random = arc4random() % 10;


switch (random)
{
    case 1:
        [[CCDirector sharedDirector] replaceScene:[CCFadeTransition transitionWithDuration:0.5f scene:s]];
        break;

    case 2:
        [[CCDirector sharedDirector] replaceScene:[CCFadeTRTransition transitionWithDuration:0.5f scene:s]];
        break;

    case 3:
        [[CCDirector sharedDirector] replaceScene:[CCJumpZoomTransition transitionWithDuration:0.5f scene:s]];
        break;

    case 4:
        [[CCDirector sharedDirector] replaceScene:[CCMoveInLTransition transitionWithDuration:0.5f scene:s]];
        break;

    case 5:
        [[CCDirector sharedDirector] replaceScene:[CCOrientedTransitionScene transitionWithDuration:0.5f scene:s]];
        break;

    case 6:
        [[CCDirector sharedDirector] replaceScene:[CCPageTurnTransition transitionWithDuration:0.5f scene:s]];
        break;

    case 7:
        [[CCDirector sharedDirector] replaceScene:[CCRotoZoomTransition transitionWithDuration:0.5f …