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App Inventor 2 使用 MaterialIcons 图标字体，快捷展示专业图标 · App Inventor 2 中文网
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字体下载
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平时布局的话，如果要使用图标，一般需要去找 png 图片，且透明背景的。如果需要根据不同常见图标进行变色的话，就需要准备多张不同样式的图标，还要考虑图片的分辨率等等...
Connecting to TCP Socket from browser using javascript
...s aimed at bring socket to browser-side js. It is a websocket server which transform websocket to socket.
ws2s schematic diagram
code sample:
var socket = new WS2S("wss://ws2s.feling.io/").newSocket()
socket.onReady = () => {
socket.connect("feling.io", 80)
socket.send("GET / HTTP/1.1\r...
Image inside div has extra space below the image
...an vertical align them, give them a height, top/bottom margin and padding, transforms ...).
This also means that:
<img> has no baseline, so when images are used in an inline formatting
context with vertical-align: baseline, the bottom of the image will be
placed on the text baseline.
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Replace multiple strings with multiple other strings
...a map of the replacements you want to the function and it would return the transformed string.
fiddle with function
To ensure Object.keys works in older browsers, add a polyfill eg from MDN or Es5.
share
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LEGO EV3 机器人传感器面板 · App Inventor 2 中文网
... 项目概述
这是一个基于 MIT App Inventor 开发的 LEGO EV3 传感器监控应用。通过蓝牙连接手机与 EV3 机器人，实时显示颜色传感器、超声波传感器和触碰传感器的状态数据。
项目作者：CAVEDU Education
难度级别：中级
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decorators in the python standard lib (@deprecated specifically)
...is using deprecated API".
Update: but you can create decorator which will transform original function into another. New function will mark/check switch telling that this function was called already and will show message only on turning switch into on state. And/or at exit it may print list of all d...
What is Data Transfer Object?
... can return View objects directly. There for you do not need an additional transformation.
For instance this is our User entity:
@Entity
public final class User {
private String id;
private String firstname;
private String lastname;
private String phone;
private String fax;
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汇编常用寄存器及指令基础总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
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DH&DL=DX：数据寄存器，常用于数据传递
为了运用所有的内存空间，8086设定了四个段寄存器，专门用来保存段地址：
CS（Code Segment）：代码段寄存器
DS（Data Segment）：数据段寄存器
SS（Stack Segment）：堆栈段寄存器
ES（Extra ...
Retrieve the position (X,Y) of an HTML element relative to the browser window
... when element is placed in div whose centered using css top:50%, left:50%; transform:translate(-50%, -50%); ... excellent. Agree whit @ScottBiggs question. Logical is to seek for simplicity.
– nelek
Sep 3 '15 at 20:57
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一分钟读懂低功耗蓝牙(BLE) MTU交换数据包 - 创客硬件开发 - 清泛IT社区，...
...PDU （Protocol Data Unit： 协议数据单元，在一个传输单元中的有效传输数据）能够传输的最大数据量（多少字节可以一次性传输到对方）。
* MTU 交换是为了在主从双方设置一个PDU中最大能够交换的数据量，通过MTU的交换...