i try to convert array of date to array of month in react when i push convertedDateToMonths to array every time i rewrite month in output i got only 1 month when i do console.log(month) what i do wrong ? Answer You need to call the setMonth function with the updated table and not on each .map loop. So just
Tag: arrays
AJAX – Convert returned octet-stream to typed array (Float64Array)
I cannot figure out what I’m doing wrong here. I’m trying to convert a binary stream, returned from an AJAX call, to an array of doubles in JavaScript. Some code: My server PHP returns an octet-stream (array of doubles): In my webpage I have an AJAX call: And then my function for processing the re…
How to pass a key value into the onchange handler for a select dropdown
I’m mapping an array[key,val] to dynamically create dropdowns. I want to pass the key from the select onChange handler so I can store the selected value in the correct index in the array. How do I pass the key. Answer You could do something like this: This way can be used for all types of form fields, b…
Update array based on id Javascript
I want to update he array based on id with some conditions. Conditions were = console.log(myupdate(data1, update1)) should update the data1 as bellow based on id here the type is changed to bar console.log(myupdate(data1, update2)) here as no item with id 125 exist so it adds a new one console.log(myupdate(da…
Find/Replace object in an array and add a key Javascript
I am trying to add a key to an Object of Array as isActive: true, and then I want to find the object in the actual array with the same label as that of selectedFilterList and replace it in this.bindingData else add isActive: false I have tried this which is working but i don’t think so its a best approa…
how to set a value of a key of an array object in javascript?
I’m creating a drag and drop files(multiple files can be selected) feature. WHere user can select multiple files.I want to convert the size of file from byte to mb. . the function to get all the files scripts.js I’m getting this as an output of files variable value in console. Why i’m using …
Reducing object values based on values pulled from array?
I am building an idle game with JavaScript. It is a game where you run a bakery. The resources of the bakery are represented within an object ‘mainObj’. The associated costs to bake an item, such as a cake or cookies, are stored in the array ‘bakeInfo’. I want to write a function that …
Dynamically create multidimensional array from split input
I have an array of ojects which all have a path and a name property. Like Here are some path examples I want to turn this into a multidimensional array like: As you can understand the amount of data is much larger. Is there a neat way to transform this data? Answer I wonder if this would be sufficient for
How to replace Array in useState?
I want make program that table content is changed by user’s select. So I put empty array in useState, like this. And select html code: When I select option, data will be changed. But I don’t no how to do it with useState. These are data And my React code: I tried using map. But I don’t know …
How to define an array with conditional elements in react
I have a arry called a tableFilterFields like this: I want to apply a condition that If prop was not undefined ….How should I do this? Answer It would be better to do the conditional operation outside the array definition. You can achieve this by conditionally doing push operation