Simplify some logic with a helper function

.cargo/config

@@ -0,0 +1,3 @@
+
+[target]
+rustflags = ["-C target-cpu=native"]

src/drivers.rs

@@ -1,6 +1,7 @@
 //! Drivers
 //!
 //! Drivers represent a connection to a specific type of database engine
+use crate::split_join_map;
 use std::fmt;
 
 #[cfg(feature = "postgres")]
@@ -80,20 +81,19 @@ pub trait DatabaseDriver: fmt::Debug {
 
         let (open_char, close_char) = self._quotes();
 
-        let mut trimmed_tiers: Vec<String> = vec![];
+        let trimmed_tiers = split_join_map(identifier, ".", |tier| {
-        for tier in identifier.split(".") {
+            let tier = tier.trim();
-            let mut tier = &mut tier.trim();
 
             // Here where the quoting actually happens. Everything
             // else is breaking down the identifier list for this.
             if tier.starts_with(open_char) && tier.ends_with(close_char) {
-                trimmed_tiers.push(tier.to_string());
+                return tier.to_string();
-            } else {
-                let tier = format!("{}{}{}", open_char, tier, close_char);
-                trimmed_tiers.push(tier.to_string());
             }
-        }
+
-        trimmed_tiers.join(".")
+            format!("{}{}{}", &open_char, tier, &close_char)
+        });
+
+        trimmed_tiers
 
         // @TODO Fix functional calls in 'select' queries
     }

src/lib.rs

@@ -6,3 +6,31 @@
 pub mod drivers;
 pub mod query_builder;
 pub mod types;
+
+pub fn split_join_map<'a>(
+    string: &'a str,
+    split_join_by: &str,
+    map_fn: impl (FnMut(&'a str) -> String)
+) -> String {
+    string.split(split_join_by)
+        .into_iter()
+        .map(map_fn)
+        .collect::<Vec<String>>()
+        .join(split_join_by)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_split_join_map() {
+        let start = "a\t,b  ,c\n,d";
+        let expected = "a,b,c,d";
+
+        assert_eq!(
+            split_join_map(start, ",", |s| s.trim().to_string()),
+            expected
+        );
+    }
+}