From b97e8c15a58761b053aafc31720ae3f746136986 Mon Sep 17 00:00:00 2001
From: MuhamedMagdi <m49dii@gmail.com>
Date: Tue, 30 Jul 2024 14:40:10 +0300
Subject: [PATCH 1/2] feat(stdlib): add new functions in `std/text`

- `reverse`: reverses the given text.
- `is_prefix`: checks if a string is a prefix of another string.
- `is_suffix`: checks if a string is a suffix of another string.

These addition of `is_prefix` & `is_suffix` complement the existing `contains` function.
---
 src/std/text.ab               | 23 +++++++++++++++++++++++
 src/tests/stdlib/is_prefix.ab |  7 +++++++
 src/tests/stdlib/is_suffix.ab |  7 +++++++
 src/tests/stdlib/reverse.ab   |  8 ++++++++
 4 files changed, 45 insertions(+)
 create mode 100644 src/tests/stdlib/is_prefix.ab
 create mode 100644 src/tests/stdlib/is_suffix.ab
 create mode 100644 src/tests/stdlib/reverse.ab

diff --git a/src/std/text.ab b/src/std/text.ab
index 426b00e0..c9c533cf 100644
--- a/src/std/text.ab
+++ b/src/std/text.ab
@@ -82,3 +82,26 @@ pub fun contains(text: Text, phrase: Text): Bool {
 
   return result == "1"
 }
+
+/// Reverse a text using `rev`
+pub fun reverse(text: Text): Text {
+    return unsafe $echo "{text}" | rev$
+}
+
+/// Check if text starts with a value
+pub fun is_prefix(text: Text, prefix: Text): Bool {
+  let result = unsafe $if [[ "{text}" == "{prefix}"* ]]; then
+    echo 1
+  fi$
+
+  return result == "1"
+}
+
+/// Check if text ends with a value
+pub fun is_suffix(text: Text, suffix: Text): Bool {
+  let result = unsafe $if [[ "{text}" == *"{suffix}" ]]; then
+    echo 1
+  fi$
+
+  return result == "1"
+}
diff --git a/src/tests/stdlib/is_prefix.ab b/src/tests/stdlib/is_prefix.ab
new file mode 100644
index 00000000..a193d364
--- /dev/null
+++ b/src/tests/stdlib/is_prefix.ab
@@ -0,0 +1,7 @@
+import * from "std/text"
+
+main {
+    if is_prefix("hello world", "hello") {
+        echo "Succeded"
+    } 
+} 
diff --git a/src/tests/stdlib/is_suffix.ab b/src/tests/stdlib/is_suffix.ab
new file mode 100644
index 00000000..39c34ecf
--- /dev/null
+++ b/src/tests/stdlib/is_suffix.ab
@@ -0,0 +1,7 @@
+import * from "std/text"
+
+main {
+    if is_suffix("hello world", "world") {
+        echo "Succeded"
+    } 
+} 
diff --git a/src/tests/stdlib/reverse.ab b/src/tests/stdlib/reverse.ab
new file mode 100644
index 00000000..c0f78aad
--- /dev/null
+++ b/src/tests/stdlib/reverse.ab
@@ -0,0 +1,8 @@
+import * from "std/text"
+
+// Output
+// dlrow olleh
+
+main {
+    echo reverse("hello world")
+} 

From ace421ab9654912705c969b1eb624ea9f7cf0da3 Mon Sep 17 00:00:00 2001
From: MuhamedMagdi <m49dii@gmail.com>
Date: Tue, 30 Jul 2024 19:11:03 +0300
Subject: [PATCH 2/2] refactor: change `is_prefix` & `is_suffix` function names

is_prefix -> starts_with
is_suffix -> ends_with
---
 src/std/text.ab                                   | 4 ++--
 src/tests/stdlib/{is_prefix.ab => ends_with.ab}   | 2 +-
 src/tests/stdlib/{is_suffix.ab => starts_with.ab} | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)
 rename src/tests/stdlib/{is_prefix.ab => ends_with.ab} (60%)
 rename src/tests/stdlib/{is_suffix.ab => starts_with.ab} (59%)

diff --git a/src/std/text.ab b/src/std/text.ab
index c9c533cf..cb43f312 100644
--- a/src/std/text.ab
+++ b/src/std/text.ab
@@ -89,7 +89,7 @@ pub fun reverse(text: Text): Text {
 }
 
 /// Check if text starts with a value
-pub fun is_prefix(text: Text, prefix: Text): Bool {
+pub fun starts_with(text: Text, prefix: Text): Bool {
   let result = unsafe $if [[ "{text}" == "{prefix}"* ]]; then
     echo 1
   fi$
@@ -98,7 +98,7 @@ pub fun is_prefix(text: Text, prefix: Text): Bool {
 }
 
 /// Check if text ends with a value
-pub fun is_suffix(text: Text, suffix: Text): Bool {
+pub fun ends_with(text: Text, suffix: Text): Bool {
   let result = unsafe $if [[ "{text}" == *"{suffix}" ]]; then
     echo 1
   fi$
diff --git a/src/tests/stdlib/is_prefix.ab b/src/tests/stdlib/ends_with.ab
similarity index 60%
rename from src/tests/stdlib/is_prefix.ab
rename to src/tests/stdlib/ends_with.ab
index a193d364..c483b66f 100644
--- a/src/tests/stdlib/is_prefix.ab
+++ b/src/tests/stdlib/ends_with.ab
@@ -1,7 +1,7 @@
 import * from "std/text"
 
 main {
-    if is_prefix("hello world", "hello") {
+    if ends_with("hello world", "world") {
         echo "Succeded"
     } 
 } 
diff --git a/src/tests/stdlib/is_suffix.ab b/src/tests/stdlib/starts_with.ab
similarity index 59%
rename from src/tests/stdlib/is_suffix.ab
rename to src/tests/stdlib/starts_with.ab
index 39c34ecf..103888aa 100644
--- a/src/tests/stdlib/is_suffix.ab
+++ b/src/tests/stdlib/starts_with.ab
@@ -1,7 +1,7 @@
 import * from "std/text"
 
 main {
-    if is_suffix("hello world", "world") {
+    if starts_with("hello world", "hello") {
         echo "Succeded"
     } 
 }