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add offset field to 'Add Line Numbers' operation #1866

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add offset field to 'Add Line Numbers' operation #1866

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11 changes: 9 additions & 2 deletions src/core/operations/AddLineNumbers.mjs
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,13 @@ class AddLineNumbers extends Operation {
this.description = "Adds line numbers to the output.";
this.inputType = "string";
this.outputType = "string";
this.args = [];
this.args = [
{
"name": "Offset",
"type": "number",
"value": 0
}
];
}

/**
Expand All @@ -33,10 +39,11 @@ class AddLineNumbers extends Operation {
run(input, args) {
const lines = input.split("\n"),
width = lines.length.toString().length;
const offset = parseInt(args[0], 10);
let output = "";

for (let n = 0; n < lines.length; n++) {
output += (n+1).toString().padStart(width, " ") + " " + lines[n] + "\n";
output += (n+1+offset).toString().padStart(width, " ") + " " + lines[n] + "\n";
}
return output.slice(0, output.length-1);
}
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