Convert some string functions

1 files changed, 37 insertions, 9 deletions

diff --git a/src/gleam_stdlib.js b/src/gleam_stdlib.js
index 960792b..15c8a09 100644
--- a/src/gleam_stdlib.js
+++ b/src/gleam_stdlib.js
@@ -1,19 +1,47 @@
 export function identity(x) {
-    return x
+  return x;
 }
 
 export function parse_int(value) {
-    if (/^[-+]?(\d+)$/.test(value)) {
-        return { "type": "Ok", "0": Number(value) }
-    } else {
-        return { "type": "Error", "0": null }
-    }
+  if (/^[-+]?(\d+)$/.test(value)) {
+    return { type: "Ok", 0: Number(value) };
+  } else {
+    return { type: "Error", 0: null };
+  }
 }
 
 export function int_to_string(int) {
-    return int.toString()
+  return int.toString();
 }
 
 export function int_to_base_string(int, base) {
-    return int.toString(base)
-}
\ No newline at end of file
+  return int.toString(base);
+}
+
+export function string_replace(string, target, substitute) {
+  return string.replaceAll(target, substitute);
+}
+
+export function string_reverse(string) {
+  return string.split("").reverse().join("");
+}
+
+export function string_length(string) {
+  if (Intl && Intl.Segmenter) {
+    let i = 0;
+    for (let _ of new Intl.Segmenter("en-gb").segment(string)) {
+      i++;
+    }
+    return i;
+  } else {
+    return string.match(/./gu).length;
+  }
+}
+
+export function string_lowercase(string) {
+  return string.toLowerCase();
+}
+
+export function string_uppercase(string) {
+  return string.toUpperCase();
+}