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Get a random item from an Array
Vlad Pasca@vladpasca5
JavaScript tip💡
This is how you get a random item from an array using JavaScript
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17:05 PM - 07 Sep 2021
Use splice() if you want to delete an element from an array
Vlad Pasca@vladpasca5JavaScript tip💡
If you want to delete an element from an array use "splice()" not "delete"
"delete" only replaces the item with "undefined" while "splice()" will remove that item from the array
See how this works here
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16:55 PM - 09 Sep 2021
Use map() when looping through arrays
Vlad Pasca@vladpasca5JavaScript tip💡
Stop using "forEach" or "for" loops to loop through an array's items
Instead, start using "map" like in this example
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16:56 PM - 11 Sep 2021
Stop using "=="
Vlad Pasca@vladpasca5JavaScript tip💡
Use "===" instead of "=="
"===" compares the value and the type while "==" compares only the value
See the difference here
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16:58 PM - 13 Sep 2021
Get a random number
Vlad Pasca@vladpasca5JavaScript tip💡
This is how you get a random number in a specific range
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16:56 PM - 15 Sep 2021
The trim() method
Vlad Pasca@vladpasca5JavaScript tip💡
Do you use the "trim()" method?
This method removes the whitespace from both sides of a string
You can see how it works here
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16:55 PM - 17 Sep 2021
The isFinite() method
Vlad Pasca@vladpasca5JavaScript tip💡
You can verify the argument before passing it to 'isFinite()'
The "isFinite()" function determines whether the passed value is a finite number.
Here is how this works
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17:05 PM - 21 Sep 2021
The toFixed() method
Vlad Pasca@vladpasca5JavaScript tip💡
The toFixed() method converts a number into a string, and then it rounds the string to a specified number of decimals.
You can see how it works here
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16:55 PM - 23 Sep 2021
This is a way you can empty an array in JavaScript
Vlad Pasca@vladpasca5JavaScript tip💡
You can use the syntax "array.length = 0" to empty an array
Here is how it works
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16:56 PM - 25 Sep 2021
Destructuring
Vlad Pasca@vladpasca5JavaScript tip💡
Destructuring assignment makes it possible to unpack values from arrays, or properties from objects, into distinct variables.
Here is how this works
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16:58 PM - 27 Sep 2021
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Top comments (6)
Please do not use map instead of forEach as a rule.
Map only makes sense if you are mapping.
This is easily misunderstood by beginners i my experience. :)
Totally agree!
Yep 👍
Doing
myArray.length = 0;is not the way, just go with[], easier, more performant and less error-prone.I also think that
.mapinstead of.forEachorforis incorrect, you should use the last two to loop arrays and the.maponly if you want a new array instance, by the way.mapis very slow.Wow, man. Amazing article and tips!
I'll be sure to use these a lot!
glad to hear that you liked this mate