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ESP8285接入App Inventor 2深度调研：4种连接方案+是否需要开发拓展 - 创客...
ESP8285接入App Inventor 2深度调研：连接方案与拓展评估
本文基于MIT App Inventor源码、fun123自研拓展源码、以及ESP8285官方数据手册，深度调研ESP8285芯片接入App Inventor 2的所有可行路径。
一、ESP8285芯片概述
ESP8285是乐鑫(Espressif)...
Open two instances of a file in a single Visual Studio session
...f
Select menu Window → New Window from the menu.
Right click the new tab and select New Vertical Tab Group
If New Window is not listed in the *Window menu note that the command does exist, even as of Visual Studio 2017. Add it to the Window menu using menu Tools → Customize → Commands. At ...
How to remove item from list in C#?
...s {
public int ID; public string FirstName; public string LastName;
}
and assigned some values to results as follows:
var results=new List<myClass> {
new myClass() { ID=1, FirstName="Bill", LastName="Smith" },
new myClass() { ID=2, FirstName="John", LastName="Wilson" },
new ...
How can I validate a string to only allow alphanumeric characters in it?
...n use LINQ:
if (yourText.All(char.IsLetterOrDigit))
{
//just letters and digits.
}
yourText.All will stop execute and return false the first time char.IsLetterOrDigit reports false since the contract of All cannot be fulfilled then.
Note! this answer do not strictly check alphanumerics (whi...
How can I change the version of npm using nvm?
...S for my node work. It works totally fine for installing separate versions and switching between them. It also installs the latest version of NPM within each local .../bin folder along with the node binary. However, there doesn't seem to be any way to switch the version of NPM that I'm using (or at ...
Capture iframe load complete event
...Script for this:
const iframe = document.getElementById('iframe');
const handleLoad = () => console.log('loaded');
iframe.addEventListener('load', handleLoad, true)
And if you're interested in Observables this does the trick:
return Observable.fromEventPattern(
handler => iframe.addEven...
JavaScript blob filename without link
...'s part of HTML5.
Some file formats are considered insecure by the browser and the download fails. Saving JSON files with txt extension works for me.
share
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CSV API for Java [closed]
...ill allow me to use read a CSV input file, do some simple transformations, and then write it.
10 Answers
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findViewById in Fragment
...mentation states that onActivityCreated() is the recommended place to find and store references to your views. You must clean up these stored references by setting them back to null in onDestroyView() or you will leak the Activity.
– Monstieur
Jun 5 '14 at 15:1...
Find out who is locking a file on a network share
...an even use Action -> Connect to another computer to the file on a NAS, and it even works with our linux based NAT! Why didn't I try this earlier?
– olorin
Sep 24 '10 at 12:51
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