Tag：location
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Time：2021-7-18
location The core of the layout: the location of the CSS box Positioning: set the box in a certain position and float freely on other boxes Positioning = positioning mode + edge offset Edge offset Top down order of three layout mechanisms Standard flow + floating + positioning Positioning mode Selector {position: property value} Static […]
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Time：2021-7-18
Problem Description: in the small program, there is no interface to directly close the pull up rebound animation of IOS. How to solve this problem? Problem solving: using absolute fixed positioning (absolute positioning is OK, but fixed is recommended for the outermost layer of the layout) can solve this problem. The layout with positioning can’t […]
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Time：2021-7-7
The design idea of reppoints is very ingenious. It uses the point set rich in semantic information to represent the target, and skillfully uses the deformable convolution to realize it. The overall network design is very complete and worth learning Source: Xiaofei’s algorithm Engineering Notes official account Reppoints: point set representation for object detection Address:https://arxiv.org/abs/1904.11490 […]
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Time：2021-7-7
about Some time ago, junior students in 2019 always wanted to develop a relatively complete project by themselves. In many applications, they chose meituan takeout to imitate. During this period, they used their spare time to develop. The front-end uses Vue + vuex + Vue router + Axios, because they need to use positioning and […]
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Time：2021-7-3
Solution cnpm: unable to load the file cnpm.ps1 JavaScript Install cnpm npm install -g cnpm –registry=https://registry.npm.taobao.org When running cnpm with power shell, the following error will be reported: Cnpm: the file C: usersadministratorappdataroamingnpmcnpm.ps1 cannot be loaded because scripts are not allowed to run on this system. For more information, see about at http://go.microsoft.com/fwlink/? LINKID = […]
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Time：2021-7-2
Es5 indexof has two shortcomings in judging whether an array contains an element. One is that it returns – 1 and the position of the element to indicate the inclusion. There is no problem in positioning, but it is not semantic enough. Another problem is that we can’t judge whether there are Nan elements let […]
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Time：2021-6-30
Causes Official definition: This wait happens when a session wants to access a database block in the buffer cache but it cannot as the buffer is “busy”. The two main cases where this can occur are: Another session is reading the block into the buffer Another session holds the buffer in an incompatible mode to […]
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Time：2021-6-15
Author: Li Tianyi, Huawei cloud EI expert Abstract driverless driving is a way to drive a car partially or completely instead of a human driver through an automatic driving system. The autopilot system is a complex system of hardware and software that covers multiple functional modules and various technologies. This article will discuss the issue […]
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Time：2021-6-10
When win10 system is installed, some font files will be installed by default to facilitate our daily use. For work needs, some specific fonts need to be downloaded and installed by ourselves, but many users can’t find the corresponding path, so where is the font folder? The following small series to explain in detail with […]
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Time：2021-6-8
function toTopHeight(el) { var top_ height = el.offsetTop; // First save the offsettop value of the current element if(el&&el.nodeName!=’HTML’) { el = el.parentElement; while(el&&el.nodeName!=” HTML “) {// when the current element is not the top HTML tag, continue the iteration if(getComputedStyle(el).position!==’static’){ //The offset top value of an element is added to the result only when […]
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Time：2021-5-31
Two kinds of index Storage engine used: MySQL 5.7 InnoDB Clustering index *If a table has a primary key set, the primary key is a clustered index *If the table has no primary key, it will default to the first not null and the unique column as the cluster index *If none of the above, […]
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Time：2021-5-9
preface Due to the rapid development of mobile Internet, now basically no front-end said that they only develop the PC end, I don’t care about the mobile end. Even a lot of front end work is mainly to develop mobile terminals, because mobile terminals are all kinds of content: WeChat applet, Alipay applet, Jingdong applet, […]
