微信小程序数组 *** 作

tabs数组对象下的值进行条件判断并修改属性值 isActive数组对象属性，v数组对象，i遍历下标

tabs.forEach((v,i)=>i===index?v.isActive=true:v.isActive=false)

collect数组对象下的值进行条件判断并修改属性值 goods_id数组对象属性，v数组对象，有一个满足的查询到了返回true

collect.some(v =>v.goods_id === this.GoodsInfo.goods_id)

//every必须每个都满足 否则是false

Array.every()

写个函数，也是来自于tp官方

function list_to_tree($list, $pk='id', $pid = 'pid', $child = '_child', $root = 0) {

// 创建Tree

$tree = array()

if(is_array($list)) {

// 创建基于主键的数组引用

$refer = array()

foreach ($list as $key =>$data) {

$refer[$data[$pk]] =&$list[$key]

}

foreach ($list as $key =>$data) {

// 判断是否存在parent

$parentId = $data[$pid]

if ($root == $parentId) {

$tree[] =&$list[$key]

}else{

if (isset($refer[$parentId])) {

$parent =&$refer[$parentId]

$parent[$child][] =&$list[$key]

}

}

}

}

return $tree

}

然后定义一维数组为$list，然后 print_r(list_to_tree($list,"id","parentsid","subnav"))

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