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Create my.js #2

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@cannist cannist commented Mar 4, 2025

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github-advanced-security[bot]
github-advanced-security bot found potential problems Mar 4, 2025
View reviewed changes
my.js
@@ -0,0 +1,3 @@
function endsWith(x, y) {
return x.lastIndexOf(y) === x.length - y.length;

Check failure

Code scanning / CodeQL

Incorrect suffix check High

This suffix check is missing a length comparison to correctly handle lastIndexOf returning -1.

Copilot Autofix

AI 10 months ago

To fix the problem, we need to ensure that the lastIndexOf method does not return -1 before comparing it to x.length - y.length. This can be achieved by adding an explicit check for the -1 case. If lastIndexOf returns -1, it means y is not a substring of x, and we should return false. Otherwise, we proceed with the original comparison.

Suggested changeset 1
my.js

Autofix patch

Autofix patch
Run the following command in your local git repository to apply this patch
cat << 'EOF' | git apply
diff --git a/my.js b/my.js
--- a/my.js
+++ b/my.js
@@ -1,3 +1,4 @@
 function endsWith(x, y) {
-  return x.lastIndexOf(y) === x.length - y.length;
+  let index = x.lastIndexOf(y);
+  return index !== -1 && index === x.length - y.length;
 }
EOF
@@ -1,3 +1,4 @@
function endsWith(x, y) {
return x.lastIndexOf(y) === x.length - y.length;
let index = x.lastIndexOf(y);
return index !== -1 && index === x.length - y.length;
}
Copilot is powered by AI and may make mistakes. Always verify output.
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@cannist