Fix float to js conversion bug, add examples for string & array libs

demo/index.html

@@ -15,7 +15,9 @@
             <option value="dom">JS & DOM</option>
             <option value="ref">Ref</option>
             <option value="callbacks">Callbacks</option>
+            <option value="string">String</option>
             <option value="struct">Struct</option>
+            <option value="array">Array</option>
         </select>
         <script src="index.js"></script>
     </body>

src/demo.ts

@@ -59,6 +59,14 @@ fn bar(callback) {
 }
 
 bar(fn("foo"));
+`,
+    "string": `
+use string;
+
+str = string_format("Hello, %!", "world");
+print str;
+print string_length(str);
+print string_replace(str, "world", "banana");
 `,
     "struct": `
 use struct;
@@ -81,7 +89,14 @@ p2 = point_new(321, 123);
 
 print "p1: " @ point_str(p1);
 print "p2: " @ point_str(p2);
-`
+`,
+    "array": `
+use array;
+
+array = array(1, 2, 3, 4, 5);
+print array_at(array, 0);
+array_remove(array, 0);
+print array_at(array, 0);`
 };
 
 const sigmaScript = new SigmaScript();

src/sigmascript/lib/js.ts

@@ -42,8 +42,7 @@ export class JSLib extends NativeLib {
         if (value === "unknown") return undefined;
         if (value === "false") return false;
         if (value === "true") return true;
-        const number = Number.parseFloat(value);
-        if (!Number.isNaN(number)) return number;
+        if (/^[0-9]+(\.[0-9]+)?$/.test(value)) return Number.parseFloat(value);
         return value;
     }
 

src/sigmascript/lib/string.ts

@@ -6,6 +6,35 @@ export class StringLib extends NativeLib {
         string_at: ([ string, index ]) => string.at(Number.parseInt(index)) ?? "unknown",
         string_length: ([ string ]) => `${string.length}`,
         string_slice: ([ string, start, end ]) => string.slice(Number.parseInt(start), Number.parseInt(end)),
-        string_replace: ([ string, search, replace ]) => string.replace(search, replace)
+        string_replace: ([ string, search, replace ]) => string.replaceAll(search, replace),
+        string_format: ([string, ...values]) => this.format(string, values)
     };
+
+    format(string: string, values: string[]) {
+        if (values.length === 0)
+            return string;
+        let result = "";
+        const strlen = string.length;
+        let i = 0;
+        let j = 0;
+        while (i < strlen) {
+            const ch = string[i];
+            ++i;
+            if (ch === "%") {
+                if (string[i] === "%")
+                    ++i;
+                else {
+                    result += values[j];
+                    ++j;
+                    if (j >= values.length) {
+                        result += string.slice(i);
+                        break;
+                    }
+                    continue;
+                }
+            }
+            result += ch;
+        }
+        return result;
+    }
 }

tsconfig.json

@@ -3,7 +3,7 @@
         "outDir": "./dist/",
         "noImplicitAny": true,
         "module": "es6",
-        "target": "es2015",
+        "target": "es2021",
         "jsx": "react",
         "allowJs": true,
         "moduleResolution": "node"