javascript.includes and javascript.indexOf unhappy with my array
How do I find a particular value in an array?
newdata
Can I decrease an array index by 1 and loop back to the end in a single line?
Lets say that I’m manually adjusting the index of an array in JavaScript. I have a function that will increase the index and another that will decrease it. I want these functions to loop (so increasing the index when already at the end will reset the index to 0 and decreasing when the index is at 0 will reset the index to the array length – 1).
How to check if an array is ‘not empty’ in Javascript
I am working on a React project which involves making queries to a Firebase database to check if a username has been taken. The result I get from the query would be an array. When the array is not empty, it means there is a matching result, and therefore the username is not available.
How to change the order of some objects from an array
I have an array of some objects
Element Access:
I’ve tried answering this question on executeprogram but I have no luck. Please help and explain if you can.
Why The Output is 4 Explain?
<html> <script> let user1=[342,4344,43]; let user2=(“424″,”100”); let join=user1.concat(user2); document.writeln(join.length); </script> </html> I M Trying to get length expected 5 but not get as i expect can you explain in deep why not happening and reason of coming 4 javascript arrays New contributor Sagar Soni is a new contributor to this site. Take care in asking […]
JS, check if an array contains a string
I have a wired requirement for one of the my JS code.
In JS I have an array like below:-
Filter array issue: filtering pots by several categories(array categories) just throwing first result id
I have tried several things, there is something I certainly not looking, so the next filter recieve a array with Articles, and a array of categories id, so the filter needs to look inside the array for the categories provided in the categories array and push in a variable array all the founds:
Modification Object array
const dat = response.rows; const newdat = dat.map((obj) => { const created = moment(obj.createdOn); const now = moment(); obj.createdOn ? { …obj, createdOn: moment(obj.createdOn).format(“YYYY/MM/DD HH:mm:ss”), time: `${now.diff(created, “hours”) % 60} Jam ${ now.diff(created, “minutes”) % 60 } Menit`, } : obj; }); console.log(newdat); this return [ undefined, undefined, undefined, undefined, undefined ] on Terminal if […]
is there a better shorthand for toggling the existance of an item inside an array?
I often have to check if an item is part of an array. If it is, I would like to remove it. If it’s not, then it should be removed. Essentially its toggling the existance of a given item in the array.