1 : la cycle de vie :
https://blog.hhking.cn/2018/09/18/react-lifecycle-change/
note sur mongo DB
Installation dans ubuntu :
https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/
installer studio 3T:
https://studio3t.com/knowledge-base/articles/installation/#install-studio-3t
d’autres outils:
https://www.guru99.com/top-20-mongodb-tools.html
*********************************************************************************
les commands utils
show dbs, show databases
use db-lyu
db : afficher la base actuelle
show collections
mongoose :
connection :fsdfs
mongoose.connect('mongodb://localhost/test', {useNewUrlParser: true});const db = mongoose.connection;db.once('open', function() {
// we're connected!
});note sur git
git init
git add
git commit -m “xxxx”
git log –oneline
git reflog
git reset –head xxxxxx
git reset –head HEAD^^^ (reculer 3 étapes)
git reset –head HEAD~3 (reculer 3 étapes)
git reset –soft xxxxx (seulement changer index de repose)
git reset –mix xxxxx (change index de repos et la cache)
git diff
git remote add xxxx https://github.com/yujunjie0603/vue3-game-plan.git
git clone
git fetch
git pull
pull = fetch + merge
git merge
use expression at the selector javascript
If you’re finding by Contains then it’ll be like this
$("input[id*='DiscountType']").each(function (i, el) {
//It'll be an array of elements
});If you’re finding by Starts With then it’ll be like this
$("input[id^='DiscountType']").each(function (i, el) {
//It'll be an array of elements
});If you’re finding by Ends With then it’ll be like this
$("input[id$='DiscountType']").each(function (i, el) {
//It'll be an array of elements
});If you want to select elements which id is not a given string
$("input[id!='DiscountType']").each(function (i, el) {
//It'll be an array of elements
});If you want to select elements which id contains a given word, delimited by spaces
$("input[id~='DiscountType']").each(function (i, el) {
//It'll be an array of elements
});If you want to select elements which id is equal to a given string or starting with that string followed by a hyphen
$("input[id|='DiscountType']").each(function (i, el) {
//It'll be an array of elements
});tableau en javascripte
la clé de tableau doit être en type interger, sinon, le longueur de tableau ne va pas être renseigné .
var person = [];
person[“firstName”] = “John”;
person[“lastName”] = “Doe”;
person[“age”] = 46;
var x = person.length; // person.length will return 0
var y = person[0]; // person[0] will return undefined