robin-sparkless 4.4.0

PySpark-like DataFrame API in Rust on Polars; no JVM.
Documentation 
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{
  "test_id": "string_ltrim",
  "pyspark_version": "3.5",
  "generated_at": "2025-10-27T14:13:12.031882",
  "input_data": [
    {
      "id": 1,
      "name": "  Alice  ",
      "age": 25
    },
    {
      "id": 2,
      "name": "Bob",
      "age": 30
    },
    {
      "id": 3,
      "name": "  Charlie",
      "age": 35
    }
  ],
  "operation": "DataFrame operation: string_ltrim",
  "expected_output": {
    "schema": {
      "field_count": 1,
      "field_names": [
        "ltrim(name)"
      ],
      "field_types": [
        "string"
      ],
      "fields": [
        {
          "name": "ltrim(name)",
          "type": "string",
          "nullable": true
        }
      ]
    },
    "data": [
      {
        "ltrim(name)": "Alice  "
      },
      {
        "ltrim(name)": "Bob"
      },
      {
        "ltrim(name)": "Charlie"
      }
    ],
    "row_count": 3
  }
}