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async function aF() {
return 89;
}
function aF() {
return Promise.resolve(89);
}
aF().then(r => r === 89);
#async functions #javascript
Remember, "this" refers to the object that the method is called on.
#javascript
a covered query is where the query itself can be satisfied entirely with an index and hence, zero documents needs to be inspected.
#mongodb
"if you can satisfy a query entirely from the index, that's going to make the query much faster"
#mongodb #coveredqueries #javascript
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why 'controllerAs' when the deault is the '$ctrl'? it won't collide with anything
#javascript #angularjs #controllerAs syntax is death
_id is always presents when you get indexes and you can't delete it
#mongodb #indexes #indexing #javascript #nosql
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if your function operates on outside variables, return a copy instead of the original - @_ericelliott
god damn it
#javascript #functions
in # javascript # objects are #arrays, they're associative arrays, basically being a list of key-value pairs
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<img src="{{imageUrl}}" /> //interpolation
<img [src]="imageUrl" /> // property binding
#angular2 #javascript
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Rx.Observable.fromEvent(div, 'click')
.filter(c => c.clientX > window.innerWidth / 2) .take(10)
.subscribe(c => log(c.clientX))
#rxjs
If an action has impact outside of the scope where it happens, we call this a "side effect".
#javascript #reactiveprogramming #rxjs
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Аневризма retweeted
Use the Webpack Dashboard to Monitor Webpack Operations - #JavaScript lesson by @mykola #free #new bit.ly/2by0g7R
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#monitoring is the action of observing and checking the behavior and outputs of a system and its components over time.
#javascript
Аневризма retweeted
Often, webpack configs get complex when it's imperatively monkey-patching the config. This is why I created github.com/kentcdodds/webpac… 👍
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