Adding log10 moonblade function

Author: wjwei-handsome

docs/moonblade/functions.md

@@ -124,6 +124,7 @@ add(trim(name) | len, 2)    - Can be used anywhere
 - **idiv**(*x*, *y*) -> `number`: Integer division of two numbers.
 - **floor**(*x*) -> `number`: Return the smallest integer lower than or equal to x.
 - **log**(*x*) -> `number`: Return the natural logarithm of x.
+- **log10**(*x*) -> `number`: Return the base 10 logarithm of x.
 - **max**(*x*, *y*, *\*n*) -> `number`: Return the maximum number.
 - **max**(*list_of_numbers*) -> `number`: Return the maximum number.
 - **min**(*x*, *y*, *\*n*) -> `number`: Return the minimum number.

src/moonblade/doc/functions.json

@@ -56,21 +56,23 @@
         "returns": "number",
         "help": "Return the natural logarithm of x."
       },
+      {
+        "name": "log10",
+        "arguments": ["x"],
+        "returns": "number",
+        "help": "Return the base 10 logarithm of x."
+      },
       {
         "name": "max",
         "arguments": ["x", "y", "*n"],
-        "alternatives": [
-          ["list_of_numbers"]
-        ],
+        "alternatives": [["list_of_numbers"]],
         "returns": "number",
         "help": "Return the maximum number."
       },
       {
         "name": "min",
         "arguments": ["x", "y", "*n"],
-        "alternatives": [
-          ["list_of_numbers"]
-        ],
+        "alternatives": [["list_of_numbers"]],
         "returns": "number",
         "help": "Return the minimum number."
       },
@@ -248,9 +250,7 @@
       {
         "name": "fmt",
         "arguments": ["string", "*replacements"],
-        "alternatives": [
-          ["string", "map"]
-        ],
+        "alternatives": [["string", "map"]],
         "returns": "string",
         "help": "Format a string by replacing \"{}\" occurrences by subsequent arguments.\n\nExample: `fmt(\"Hello {} {}\", name, surname)` will replace the first \"{}\" by the value of the name column, then the second one by the value of the surname column.\n\nCan also be given a substitution map like so:\n`fmt(\"Hello {name}\", {name: \"John\"})`."
       },

src/moonblade/functions.rs

@@ -133,6 +133,10 @@ pub fn get_function(name: &str) -> Option<(Function, FunctionArguments)> {
             |args| unary_arithmetic_op(args, DynamicNumber::ln),
             FunctionArguments::unary(),
         ),
+        "log10" => (
+            |args| unary_arithmetic_op(args, DynamicNumber::log10),
+            FunctionArguments::unary(),
+        ),
         "lower" => (lower, FunctionArguments::unary()),
         "lru" => (lru, FunctionArguments::unary()),
         "ltrim" => (ltrim, FunctionArguments::with_range(1..=2)),

src/moonblade/types/dynamic_number.rs

@@ -117,6 +117,10 @@ impl DynamicNumber {
         self.map_float(f64::ln)
     }
 
+    pub fn log10(self) -> Self {
+        self.map_float(f64::log10)
+    }
+
     pub fn exp(self) -> Self {
         self.map_float(f64::exp)
     }