Imagine I have an array such as [1,2,3] and my goal is to insert its values into a string format like:
the values are (?, ?, ?)
Can anyone suggest a simple solution for this?
I am aware of the spread operator ...[1,2,3], and it's feasible to convert the array to ['?', '?', '?']. However, this approach fails when attempting something like:
the values are (${...['?', '?', '?']})
When performing this task, the spread operator is not really necessary.
The question is slightly unclear about whether you specifically want the symbol ? in the string or if you want to include the values from the array. Here are solutions for both scenarios:
If you require the symbol ? (literally), you can achieve it using map along with join:
`the values are (${theArray.map(() => "?").join(", ")})`
var theArray = [1, 2, 3];
console.log(`the values are (${theArray.map(() => "?").join(", ")}`);Alternatively, you could use String#repeat together with slice to remove the last delimiter:
`the values are (${"?, ".repeat(theArray.length).slice(0, -2)})`
var theArray = [1, 2, 3];
console.log(`the values are (${"?, ".repeat(theArray.length).slice(0, -2)})`);If you want to display the actual values, you can simply use the join method:
`the values are (${theArray.join(", ")})`
var theArray = [1, 2, 3];
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