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How to filter array in subdocument with MongoDB [duplicate]
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Use $filter aggregation
Selects a subset of the array to return based on the specified
condition. Returns an array with only those elements that match the
condition. The returned elements are in the original order.
db.test.aggregate([
{$match: {"list.a": {$gt:3}}}, // <-- mat...
How to sort an ArrayList in Java [duplicate]
... of this class and adding each fruit in the list. I want to sort this list based on the order of fruit name.
3 Answers
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Headless Browser and scraping - solutions [closed]
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http://triflejs.org/ is like phantomjs but based on IE
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C++ template中typename和class的区别 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ame 去标识 nested dependent type names（嵌套依赖类型名），在 base class lists（基类列表）中或在一个 member initialization list（成员初始化列表）中作为一个 base class identifier（基类标识符）时除外。
For example:
using namespace std;
template...
phpcms v9类别调用方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...'caches_model'.DIRECTORY_SEPARATOR.'caches_data'.DIRECTORY_SEPARATOR);
pc_base::load_app_func('util','content');
class type {
private $db;
function __construct() {
$this->db = pc_base::load_model('content_model');
}
/**
* 按照模型搜索
*/
public function init() {
if(!i...
一体化的Linux系统性能和使用活动监控工具–Sysstat - 更多技术 - 清泛网 -...
...ix 选项配置了“/usr”内容。
# yum remove sysstat [On RedHat based System]
# apt-get remove sysstat [On Debian based System]
# ./configure --prefix=/usr
# make
# make install
现在，使用相同的“”mpstat命令和“-V”选项再一次确认更新的版本。
# mpsta...
优惠券批量生成及导入的思路 - 闲聊区 - 清泛IT论坛，有思想、有深度
...;$n = mt_rand(0, PHP_INT_MAX);
$m = base_convert($m, 10, 36); // 主随机
$n = base_convert($n, 10, 36); // 辅随机
$r = substr($m . $n, 0, 16);
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What's the difference between Unicode and UTF-8? [duplicate]
...lem.)
If it makes you feel any better about it, ‘ANSI’ strings aren't based on any ANSI standard, either.
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Sorting HashMap by values [duplicate]
... while loops. Converting the Entry Set to a List and then sorting the List based on a comparator would be a more efficient solution.
– picmate 涅
May 21 '16 at 2:53
1
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Why are margin/padding percentages in CSS always calculated against width?
...-right/margin-bottom/margin-left, all four have to be relative to the same base. If top/bottom used a different base than left/right', then "n%" margin (and padding) wouldn't mean the same thing on all four sides.
(Also note having the top/bottom margin relative to the width enables a weird CSS ha...