Text lines count

text-lines-count · version 1.0.0 · Text · free, no key needed

Count exact line multiplicities in first-seen order.

Use when you need to: text lines count · count lines · line histogram.

Supported

• text lines count
• count lines
• line histogram

Not supported

• trim
• case fold
• sort by count
• locale

Behavior

• Split on CR LF, LF, or CR. Do not treat other Unicode separators as line breaks.
• A trailing terminator does not create an extra empty line.
• Empty document -> zero lines, trailing_terminator false.
• A document that is only a terminator -> one empty line, trailing_terminator true.
• A document with no terminator -> last line kept, trailing_terminator false.
• Preserve empty lines in the middle.
• Output reconstruction uses LF. If the result has at least one line, append a trailing LF iff the selected window includes the original trailing terminator or includes a line that was followed by a separator in the source.
• No trimming, case folding, Unicode normalization, or locale rules.
• Each distinct line body gets a count of exact occurrences.
• Items are emitted in first-seen order.
• line values are the parsed bodies without terminators.

Input

• text (string, required): max length 256000

Output

• items (array of object, required)
• lines_in (integer, required)
• unique (integer, required)

Limits

• max input bytes: 256000
• max lines: 10000

Example

Request input:

{
  "text": "a\nb\na\n"
}

Response:

{
  "result": {
    "items": [
      {
        "line": "a",
        "count": 2
      },
      {
        "line": "b",
        "count": 1
      }
    ],
    "lines_in": 3,
    "unique": 2
  }
}

How to call it

MCP

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

{
  "id": "text-lines-count",
  "version": "1.0.0",
  "input": {
    "text": "a\nb\na\n"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/text-lines-count/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"text":"a\nb\na\n"}'

The machine-readable contract is at /v1/tools/text-lines-count/versions/1.0.0.

CLI

node cli.mjs run text-lines-count 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• Text count: Count Unicode code points, UTF-16 code units, UTF-8 bytes, and lines.
• Text diff stats: Summarize a line-record diff as keep, insert, delete, and hunk counts.
• Text line diff: Diff two texts as line records, preserving each line terminator.
• Text lines difference: Set difference a minus b using exact line equality.
• Text lines multiset subtract: Multiset subtract b from a: remaining counts, first-seen order from a.
• Text lines multiset union: Multiset sum of two line bags: counts add, first-seen order from a then new from b.