diff --git a/src/uu/chmod/src/chmod.rs b/src/uu/chmod/src/chmod.rs
index b007bb1d7..31663b1af 100644
--- a/src/uu/chmod/src/chmod.rs
+++ b/src/uu/chmod/src/chmod.rs
@@ -335,9 +335,7 @@ impl Chmoder {
                 let mut new_mode = fperm;
                 let mut naively_expected_new_mode = new_mode;
                 for mode in cmode_unwrapped.split(',') {
-                    // cmode is guaranteed to be Some in this case
-                    let arr: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
-                    let result = if mode.contains(arr) {
+                    let result = if mode.chars().any(|c| c.is_ascii_digit()) {
                         mode::parse_numeric(new_mode, mode, file.is_dir()).map(|v| (v, v))
                     } else {
                         mode::parse_symbolic(new_mode, mode, get_umask(), file.is_dir()).map(|m| {
@@ -352,20 +350,22 @@ impl Chmoder {
                             (m, naive_mode)
                         })
                     };
+
                     match result {
                         Ok((mode, naive_mode)) => {
                             new_mode = mode;
                             naively_expected_new_mode = naive_mode;
                         }
                         Err(f) => {
-                            if self.quiet {
-                                return Err(ExitCode::new(1));
+                            return if self.quiet {
+                                Err(ExitCode::new(1))
                             } else {
-                                return Err(USimpleError::new(1, f));
-                            }
+                                Err(USimpleError::new(1, f))
+                            };
                         }
                     }
                 }
+
                 self.change_file(fperm, new_mode, file)?;
                 // if a permission would have been removed if umask was 0, but it wasn't because umask was not 0, print an error and fail
                 if (new_mode & !naively_expected_new_mode) != 0 {
diff --git a/src/uu/install/src/mode.rs b/src/uu/install/src/mode.rs
index f9018e16f..ebdec14af 100644
--- a/src/uu/install/src/mode.rs
+++ b/src/uu/install/src/mode.rs
@@ -9,10 +9,7 @@ use uucore::mode;
 
 /// Takes a user-supplied string and tries to parse to u16 mode bitmask.
 pub fn parse(mode_string: &str, considering_dir: bool, umask: u32) -> Result<u32, String> {
-    let numbers: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
-
-    // Passing 000 as the existing permissions seems to mirror GNU behavior.
-    if mode_string.contains(numbers) {
+    if mode_string.chars().any(|c| c.is_ascii_digit()) {
         mode::parse_numeric(0, mode_string, considering_dir)
     } else {
         mode::parse_symbolic(0, mode_string, umask, considering_dir)
diff --git a/src/uu/mkdir/src/mkdir.rs b/src/uu/mkdir/src/mkdir.rs
index 2044855e4..76aa51f07 100644
--- a/src/uu/mkdir/src/mkdir.rs
+++ b/src/uu/mkdir/src/mkdir.rs
@@ -38,31 +38,27 @@ fn get_mode(_matches: &ArgMatches, _mode_had_minus_prefix: bool) -> Result<u32,
 
 #[cfg(not(windows))]
 fn get_mode(matches: &ArgMatches, mode_had_minus_prefix: bool) -> Result<u32, String> {
-    let digits: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
-    // Translate a ~str in octal form to u16, default to 777
     // Not tested on Windows
     let mut new_mode = DEFAULT_PERM;
-    match matches.get_one::<String>(options::MODE) {
-        Some(m) => {
-            for mode in m.split(',') {
-                if mode.contains(digits) {
-                    new_mode = mode::parse_numeric(new_mode, m, true)?;
+
+    if let Some(m) = matches.get_one::<String>(options::MODE) {
+        for mode in m.split(',') {
+            if mode.chars().any(|c| c.is_ascii_digit()) {
+                new_mode = mode::parse_numeric(new_mode, m, true)?;
+            } else {
+                let cmode = if mode_had_minus_prefix {
+                    // clap parsing is finished, now put prefix back
+                    format!("-{mode}")
                 } else {
-                    let cmode = if mode_had_minus_prefix {
-                        // clap parsing is finished, now put prefix back
-                        format!("-{mode}")
-                    } else {
-                        mode.to_string()
-                    };
-                    new_mode = mode::parse_symbolic(new_mode, &cmode, mode::get_umask(), true)?;
-                }
+                    mode.to_string()
+                };
+                new_mode = mode::parse_symbolic(new_mode, &cmode, mode::get_umask(), true)?;
             }
-            Ok(new_mode)
-        }
-        None => {
-            // If no mode argument is specified return the mode derived from umask
-            Ok(!mode::get_umask() & 0o0777)
         }
+        Ok(new_mode)
+    } else {
+        // If no mode argument is specified return the mode derived from umask
+        Ok(!mode::get_umask() & 0o0777)
     }
 }
 
diff --git a/src/uu/mknod/src/parsemode.rs b/src/uu/mknod/src/parsemode.rs
index adacaa45b..c38800bcb 100644
--- a/src/uu/mknod/src/parsemode.rs
+++ b/src/uu/mknod/src/parsemode.rs
@@ -11,8 +11,7 @@ use uucore::mode;
 pub const MODE_RW_UGO: mode_t = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
 
 pub fn parse_mode(mode: &str) -> Result<mode_t, String> {
-    let arr: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
-    let result = if mode.contains(arr) {
+    let result = if mode.chars().any(|c| c.is_ascii_digit()) {
         mode::parse_numeric(MODE_RW_UGO as u32, mode)
     } else {
         mode::parse_symbolic(MODE_RW_UGO as u32, mode, true)
diff --git a/src/uucore/src/lib/features/mode.rs b/src/uucore/src/lib/features/mode.rs
index cbaea71bf..147624891 100644
--- a/src/uucore/src/lib/features/mode.rs
+++ b/src/uucore/src/lib/features/mode.rs
@@ -147,8 +147,7 @@ pub fn parse_mode(mode: &str) -> Result<mode_t, String> {
     #[cfg(any(target_os = "freebsd", target_vendor = "apple", target_os = "android"))]
     let fperm = (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH) as u32;
 
-    let arr: &[char] = &['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'];
-    let result = if mode.contains(arr) {
+    let result = if mode.chars().any(|c| c.is_ascii_digit()) {
         parse_numeric(fperm, mode, true)
     } else {
         parse_symbolic(fperm, mode, get_umask(), true)