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Using join() method to concatenate items in a list to a single string. The join() is an inbuilt string function in Python used to join elements of the sequence separated by a string separator. This function joins elements of a sequence and makes it a string.
The most conventional method to perform the list concatenation, the use of “+” operator can easily add the whole of one list behind the other list and hence perform the concatenation.
The string join() method returns a string by joining all the elements of an iterable (list, string, tuple), separated by the given separator.
Use str. join() to join a list of strings. Call str. join(iterable) to join each element in the list of strings iterable with each element connected by the separator str .
Scala is new to me so I'm not sure the best way to go about this.
I need to simply take the strings within a single list and join them.
So, concat(List("a","b","c")) returns abc.
Should I first see how many strings there are in the list, that way I can just loop through and join them all? I feel like that needs to be done first, that way you can use the lists just like an array and do list[1] append list[2] append list[3], etc..
Edit:
Here's my idea, of course with compile errors..
def concat(l: List[String]): String = {
var len = l.length
var i = 0
while (i < len) {
val result = result :: l(i) + " "
}
result
}
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