首页 \ 问答 \ Love2d:站在侦测上(Love2d: stand on Detection)

Love2d:站在侦测上(Love2d: stand on Detection)

我只是想知道是否有某种方法可以立即检测

if love.keyboard.isDown("up") then
fplayer.body:applyForce(0,-1000)
end

也许就像

if (love.keyboard.isDown("up") and isonground==true) then

I just wanna know if there is some kind a way for stand on detection

if love.keyboard.isDown("up") then
fplayer.body:applyForce(0,-1000)
end

So maybe like

if (love.keyboard.isDown("up") and isonground==true) then

原文:https://stackoverflow.com/questions/37728513
更新时间:2023-07-30 16:07

最满意答案

如果你运行这些,你会看到MySQL重写如何处理它们。 请注意,show warnings中的SQL并不总是有效的SQL语法

explain extended select d.id, d.wfid, d.docid , k.keyword, k.value from keywords k
inner join documents d 
where k.document_id in (23,24) AND k.document_id = d.id;
show warnings;

If you run these you n see how MySQL rewrite handle them. Note the SQL in the show warnings is not always valid SQL syntax

explain extended select d.id, d.wfid, d.docid , k.keyword, k.value from keywords k
inner join documents d 
where k.document_id in (23,24) AND k.document_id = d.id;
show warnings;

相关问答

更多
  • 你必须使用concat形成子句... ...LIKE CONCAT('%',tbl_albums.name, '%'); 在mysql中没有像这样的运算符 you have to form the clause using concat ... ...LIKE CONCAT('%',tbl_albums.name, '%'); there is no + operator like this in mysql
  • 如果你运行这些,你会看到MySQL重写如何处理它们。 请注意,show warnings中的SQL并不总是有效的SQL语法 explain extended select d.id, d.wfid, d.docid , k.keyword, k.value from keywords k inner join documents d where k.document_id in (23,24) AND k.document_id = d.id; show warnings; If you run the ...
  • 你需要把它放在join子句中,而不是在where : SELECT * FROM categories LEFT JOIN user_category_subscriptions ON user_category_subscriptions.category_id = categories.category_id and user_category_subscriptions.user_id =1 看一个inner join ,在一个inner join中放置一个子句,或者等效的。 然而 ...
  • 大部分时间与Mysql查询优化器相同,内部优化和连接基本上都是额外的条件。 您还可以基准测试或使用EXPLAIN / DESCRIBE来查看查询的实际执行方式以及查询执行计划的内容 。 Most of the time is the same thing as Mysql Query Optimizer does the internal optimization and joins are basically extra conditions. You can also benchmark or use ...
  • 既然你提到你已经尝试了LEFT JOIN并且你得到的结果不是你期望的结果,那是因为你在最终结果中查询runner = 7 。 将语句移动到ON子句上,它将起作用。 SELECT p.ID, rr.leaguepoints FROM wp_posts p LEFT JOIN wp_raceresult rr ON p.id = rr.race AND rr.runner = 7 ...
  • 是试试这个 SELECT T1.entity_id, T1.parent_id, T1.name As Label, T1.url_key As Name FROM magento_catalog_category_flat_store_1 T1 INNER JOIN magento_catalog_category_flat_store_1 as T2 ON T1.entity_id = T2.parent_id RIGHT JOIN sohyper_region_activi ...
  • 一种方法是将原始查询包装为子查询,并将WHERE子句移动到外部查询: SELECT * FROM ( SELECT `candidates`.`candidate_id`, -- this is the original query `candidates`.`first_name`, `candidates`.`surname`, `candidates`.`DOB`, `candidates`.`gender`, DATE_FORMAT(NO ...
  • $sql = " SELECT message.Message, message.Period, message.Date, teacher.Firstname, teacher.Lastname, rooms.Room_ID, rooms.Description FROM message LEFT JOIN teacher ON teacher.Teacher_ID = message.Teacher_ID LEFT JOIN rooms ON message.Room ...
  • 试试这个: SELECT T.user_id, U.username, T.score, T.time FROM tests_1 T JOIN users U on U.user_id = T.user_id WHERE T.score = ( SELECT MAX(T2.score) FROM tests_1 T2 WHERE T2.user_id = T.user_id ) ORDER BY T.score DESC, T.time ASC; Try this: SELECT T.user_id, ...

相关文章

更多

最新问答

更多
  • 您如何使用git diff文件,并将其应用于同一存储库的副本的本地分支?(How do you take a git diff file, and apply it to a local branch that is a copy of the same repository?)
  • 将长浮点值剪切为2个小数点并复制到字符数组(Cut Long Float Value to 2 decimal points and copy to Character Array)
  • OctoberCMS侧边栏不呈现(OctoberCMS Sidebar not rendering)
  • 页面加载后对象是否有资格进行垃圾回收?(Are objects eligible for garbage collection after the page loads?)
  • codeigniter中的语言不能按预期工作(language in codeigniter doesn' t work as expected)
  • 在计算机拍照在哪里进入
  • 使用cin.get()从c ++中的输入流中丢弃不需要的字符(Using cin.get() to discard unwanted characters from the input stream in c++)
  • No for循环将在for循环中运行。(No for loop will run inside for loop. Testing for primes)
  • 单页应用程序:页面重新加载(Single Page Application: page reload)
  • 在循环中选择具有相似模式的列名称(Selecting Column Name With Similar Pattern in a Loop)
  • System.StackOverflow错误(System.StackOverflow error)
  • KnockoutJS未在嵌套模板上应用beforeRemove和afterAdd(KnockoutJS not applying beforeRemove and afterAdd on nested templates)
  • 散列包括方法和/或嵌套属性(Hash include methods and/or nested attributes)
  • android - 如何避免使用Samsung RFS文件系统延迟/冻结?(android - how to avoid lag/freezes with Samsung RFS filesystem?)
  • TensorFlow:基于索引列表创建新张量(TensorFlow: Create a new tensor based on list of indices)
  • 企业安全培训的各项内容
  • 错误:RPC失败;(error: RPC failed; curl transfer closed with outstanding read data remaining)
  • C#类名中允许哪些字符?(What characters are allowed in C# class name?)
  • NumPy:将int64值存储在np.array中并使用dtype float64并将其转换回整数是否安全?(NumPy: Is it safe to store an int64 value in an np.array with dtype float64 and later convert it back to integer?)
  • 注销后如何隐藏导航portlet?(How to hide navigation portlet after logout?)
  • 将多个行和可变行移动到列(moving multiple and variable rows to columns)
  • 提交表单时忽略基础href,而不使用Javascript(ignore base href when submitting form, without using Javascript)
  • 对setOnInfoWindowClickListener的意图(Intent on setOnInfoWindowClickListener)
  • Angular $资源不会改变方法(Angular $resource doesn't change method)
  • 在Angular 5中不是一个函数(is not a function in Angular 5)
  • 如何配置Composite C1以将.m和桌面作为同一站点提供服务(How to configure Composite C1 to serve .m and desktop as the same site)
  • 不适用:悬停在悬停时:在元素之前[复制](Don't apply :hover when hovering on :before element [duplicate])
  • 常见的python rpc和cli接口(Common python rpc and cli interface)
  • Mysql DB单个字段匹配多个其他字段(Mysql DB single field matching to multiple other fields)
  • 产品页面上的Magento Up出售对齐问题(Magento Up sell alignment issue on the products page)