CSV abs integer column

csv-abs-integer-column · version 1.0.0 · CSV & tables · free, no key needed

Replace every data cell in a named CSV column with the absolute value of a canonical integer.

Use when you need to: csv abs integer column · absolute value csv integer column · csv column absolute value.

Supported

• csv abs integer column
• absolute value csv integer column
• csv column absolute value

Not supported

• floating point abs
• complex modulus
• unicode digit normalization
• read files
• fetch urls

Behavior

• The first CSV record is the header row. Duplicate and empty header names are rejected.
• column names an existing header exactly; no trimming, case folding, or fuzzy matching.
• Every data cell in column is a canonical integer string parsed with BigInt. Empty cells and non-integers are invalid. -0 is accepted and canonicalized to 0.
• Each output cell is the canonical integer string of the absolute value. The result is never negative.
• An empty document without a header is rejected. A header-only document is returned unchanged.
• Other columns and row order are preserved. The first output header name may not begin with U+FEFF.

Input

• csv (string, required): max length 256000
• column (string, required): min length 1; max length 256

Output

• csv (string, required)

Limits

• max input bytes: 256000
• max data rows: 5000
• max columns: 256
• max header name bytes: 256
• max integer digits: 1000
• max output bytes: 256000

Example

Request input:

{
  "csv": "n,label\n-5,a\n0,b\n12,c\n-0,d\n",
  "column": "n"
}

Response:

{
  "result": {
    "csv": "n,label\n5,a\n0,b\n12,c\n0,d\n"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "csv-abs-integer-column",
  "version": "1.0.0",
  "input": {
    "csv": "n,label\n-5,a\n0,b\n12,c\n-0,d\n",
    "column": "n"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/csv-abs-integer-column/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"csv":"n,label\n-5,a\n0,b\n12,c\n-0,d\n","column":"n"}'

The machine-readable contract is at /v1/tools/csv-abs-integer-column/versions/1.0.0.

CLI

node cli.mjs run csv-abs-integer-column 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• CSV clamp integer column: Clamp every data cell in a named CSV column to optional canonical integer min and max bounds.
• CSV filter equals: Keep CSV data rows whose named column equals an exact string.
• CSV scale integer column: Multiply every data cell in a named CSV column by a canonical integer factor.
• CSV sum integers: Sum a CSV column of strict signed base-10 integer strings using BigInt.
• CSV distinct values: List distinct exact values of one CSV column in first-seen order.
• CSV min max integers: Minimum and maximum of a CSV column of strict signed base-10 integer strings.