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Add Indexing and slicing of matrices section #19

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Merged
Supravisor merged 8 commits into from
Feb 9, 2026
Merged

Add Indexing and slicing of matrices section #19

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3632b50
Merge pull request #18 from Supravisor/main
Supravisor Feb 9, 2026
caa5db0
add access sub index button
Supravisor Feb 9, 2026
3281d83
add sub index input field
Supravisor Feb 9, 2026
e2efd7f
add accessSubMatrix function
Supravisor Feb 9, 2026
d5fc29a
add access matrix button
Supravisor Feb 9, 2026
9234959
add accessMiddleMatrix function
Supravisor Feb 9, 2026
279b778
add indexMatrix variable
Supravisor Feb 9, 2026
081511f
add subIndexMatrix variable
Supravisor Feb 9, 2026
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9 changes: 9 additions & 0 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -85,6 +85,15 @@ <h2>Indexing and slicing of matrices</h2>
<input class="btn" name="indexMatrix" id="indexMatrix" placeholder="index" type="number" />
</p>

<p>
<input type="button" class="btn btn-primary" value="access sub index" onclick="accessSubMatrix();" />
<input class="btn" name="subIndexMatrix" id="subIndexMatrix" placeholder="sub index" type="number" />
</p>

<p>
<input type="button" class="btn btn-primary" value="access matrix" onclick="accessMiddleMatrix();" />
</p>

</div>
</td>
<td id="textbox">
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35 changes: 35 additions & 0 deletions script.js
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Expand Up @@ -86,6 +86,9 @@ const memorySize = () => {
}

// Indexing and slicing of matrices
let indexMatrix = document.getElementById("indexMatrix");
let subIndexMatrix = document.getElementById("subIndexMatrix");

const accessMatrix = () => {
if (variable.value === "") {
return alert("Please enter a variable name in the 'variable' field.");
Expand All @@ -97,3 +100,35 @@ const accessMatrix = () => {
document.editor.textbox.value+= "\n" + variable.value + "[" + indexMatrix.value + "]";
}
}

const accessSubMatrix = () => {
if (variable.value === "") {
return alert("Please enter a variable name in the 'variable' field.");
} else if (Math.abs(Number(variable.value)) >= 0) {
return alert("Please do not enter a number in the 'variable' field.");
} else if (indexMatrix.value === "") {
return alert("Please enter a number in the 'index' field.")
} else if (subIndexMatrix.value === "") {
return alert("Please enter a number in the 'sub index' field.")
} else {
document.editor.textbox.value+= "\n" + variable.value + "[" + indexMatrix.value + ", " + subIndexMatrix.value + "]";
}
}

const accessMiddleMatrix = () => {
if (variable.value === "") {
return alert("Please enter a variable name in the 'variable' field.");
} else if (Math.abs(Number(variable.value)) >= 0) {
return alert("Please do not enter a number in the 'variable' field.");
} else if (start1Matrix.value === "") {
return alert("Please enter a number in the 'start 1' field.")
} else if (end1Matrix.value === "") {
return alert("Please enter a number in the 'end 1' field.")
} else if (start2Matrix.value === "") {
return alert("Please enter a number in the 'start 2' field.")
} else if (end2Matrix.value === "") {
return alert("Please enter a number in the 'end 2' field.")
} else {
document.editor.textbox.value+= "\n" + variable.value + "[" + start1Matrix.value + ":" + end1Matrix.value + ", " + start2Matrix.value + ":" + end2Matrix.value + "]";
}
}