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React.js: Identifying different inputs with one onChange handler
...ct.createClass({
getInitialState: function() {
return {input1: 0, input2: 0};
},
render: function() {
const total = this.state.input1 + this.state.input2;
return (
<div>{total}<br/>
<input type="text" value={this.state.i...
MongoDB Many-to-Many Association
...s _id in the roles array instead of the name:
{name:"Joe"
,roles:["4b5783300334000000000aa9","5783300334000000000aa943","6c6793300334001000000006"]
}
and set up the roles like:
{_id:"6c6793300334001000000006"
,rolename:"Engineer"
}
...
In Flux architecture, how do you manage Store lifecycle?
...
answered May 11 '14 at 20:10
fisherwebdevfisherwebdev
12.6k44 gold badges2525 silver badges2727 bronze badges
...
How do I use shell variables in an awk script?
...}' var="${variable}" file
Adding multiple variables:
awk '{print a,b,$0}' a="$var1" b="$var2" file
In this way we can also set different Field Separator FS for each file.
awk 'some code' FS=',' file1.txt FS=';' file2.ext
Variable after the code block will not work for the BEGIN block:
e...
How to get the latest tag name in current branch in Git?
...
440
You could take a look at git describe, which does something close to what you're asking.
...
What breaking changes are introduced in C++11?
...DIS has a section for incompatibilities, at appendix C.2 "C++ and ISO C++ 2003".
Summary, paraphrasing the FDIS here, to make it (better) suitable as a SO answer. I added some examples of my own to illustrate the differences.
There are a few library-related incompatibilities where I don't exactly...
How to calculate the time interval between two time strings
I have two times, a start and a stop time, in the format of 10:33:26 (HH:MM:SS). I need the difference between the two times. I've been looking through documentation for Python and searching online and I would imagine it would have something to do with the datetime and/or time modules. I can't ge...
How to pass an object into a state using UI-router?
...
In version 0.2.13, You should be able to pass objects into $state.go,
$state.go('myState', {myParam: {some: 'thing'}})
$stateProvider.state('myState', {
url: '/myState/{myParam:json}',
params: {myParam:...
Convert dd-mm-yyyy string to date
...#datepicker").val().split("-")
var f = new Date(from[2], from[1] - 1, from[0])
Use regex
var date = new Date("15-05-2018".replace( /(\d{2})-(\d{2})-(\d{4})/, "$2/$1/$3"))
Why not use regex?
Because you know you'll be working on a string made up of three parts, separated by hyphens.
However, i...
App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05 · App Inventor 2 中文网
... App Inventor 2 经典蓝牙(SPP) 硬件接入：hc05
HC05 简单介绍
基本接入代码参考
常见问题解决
Error 515: Not connected to a Bluetooth device.
Error 507: unable to connect. is the device turned...