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Programming-Idioms

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Idiom #362 Create delimited list

From list a, create the text s specifying the contents of a, such that items are separated by delimiter d and items containing 1 or more spaces are quoted with quote character q.
Example: "A "," B"," C ",D,E,F

import static java.lang.String.join;
import java.util.ArrayList;
import java.util.List;
class QuotedList extends ArrayList<String> {
    String d, q;
    QuotedList(String d, String q) {
        this.d = d;
        this.q = q;
    }
    public boolean add(String s) {
        if (s.contains(" ")) s = q + s + q;
        return super.add(s);
    }
    public String toString() {
        return join(d, this);
    }
}
QuotedList x = new QuotedList(d, q) {{
    for (var x : a) add(x);
}};
String s = x.toString();
String s = a.stream()
    .map(x -> {
        if (!x.contains(" ")) return x;
        return q + x + q;
    })
    .reduce((x, y) -> x + d + y)
    .get();
classes
  a.Delimiter := d;
  a.QuoteChar := q;
  a.StrictDelimiter := False;
  a.AlwaysQuote := False;
  s := a.DelimitedText;

from string import whitespace as ws
class QuotedList(list):
    def __init__(self, x, /, d='\t', q='\''):
        super().__init__()
        self.d, self.q = d, q
        for x in x: self.append(x)
    def append(self, x):
        if any(c in ws for c in x):
            q = self.q
            x = q + x + q
        return super().append(x)
    def to_string(self):
        return self.d.join(self)
x = QuotedList(a, d, q)
s = x.to_string()
from string import whitespace as ws
def f(x):
    if any(c in ws for c in x):
        return q + x + q
    return x
s = d.join(map(f, a))
s = a.map{_1.include?(" ") ? q + _1 + q : _1 }.join(d)
New implementation...
< > ⌨
Bart 
class QuotedList extends ArrayList<String> {
    String d, q;
    QuotedList(String d, String q) {
        this.d = d;
        this.q = q;
    }
    public boolean add(String s) {
        if (s.contains(" ")) s = q + s + q;
        return super.add(s);
    }
    public String toString() {
        return join(d, this);
    }
}
QuotedList x = new QuotedList(d, q) {{
    for (var x : a) add(x);
}};
String s = x.toString();
String s = a.stream()
    .map(x -> {
        if (!x.contains(" ")) return x;
        return q + x + q;
    })
    .reduce((x, y) -> x + d + y)
    .get();
  a.Delimiter := d;
  a.QuoteChar := q;
  a.StrictDelimiter := False;
  a.AlwaysQuote := False;
  s := a.DelimitedText;

class QuotedList(list):
    def __init__(self, x, /, d='\t', q='\''):
        super().__init__()
        self.d, self.q = d, q
        for x in x: self.append(x)
    def append(self, x):
        if any(c in ws for c in x):
            q = self.q
            x = q + x + q
        return super().append(x)
    def to_string(self):
        return self.d.join(self)
x = QuotedList(a, d, q)
s = x.to_string()
def f(x):
    if any(c in ws for c in x):
        return q + x + q
    return x
s = d.join(map(f, a))
s = a.map{_1.include?(" ") ? q + _1 + q : _1 }.join(d)