fix: refactor api usage, tests, remove obsolete files

.gitignore

@@ -58,3 +58,16 @@ UI.md
 
 # Examples
 examples/
+
+# Test fixtures
+test/fixtures
+
+# Documentation
+docs/  
+
+# Test and demo files
+arrow-demo.cjs
+arrow-test.cjs
+test-arrow.js
+test-output/
+tinyframejs-*.tgz

docs/io-module.md

@@ -314,7 +314,7 @@ async function getBitcoinPrices() {
   const standardized = applySchema(data, binanceOHLCV);
 
   // Преобразование в DataFrame
-  return DataFrame.fromRows(standardized);
+  return DataFrame.fromRecords(standardized);
 }
 
 // Использование

src/core/dataframe/DataFrame.js

@@ -30,7 +30,8 @@
       value: {
         /**
          * low-level vector getter (internal)
-         * @param n
+         * @param {string} n - Column name
+         * @returns {import('../storage/ColumnVector.js').ColumnVector|undefined} - Column vector or undefined if not found
          */
         getColumn: (n) => this._columns[n]?.vector,
       },
@@ -44,7 +45,7 @@
   static create = (cols, opts = {}) => new DataFrame(cols, opts);
   static fromColumns = (cols, opts = {}) => new DataFrame(cols, opts);
 
-  static fromRows(rows = [], opts = {}) {
+  static fromRecords(rows = [], opts = {}) {
     if (!rows.length) return new DataFrame({}, opts);
     const cols = {};
     for (const k of Object.keys(rows[0])) cols[k] = rows.map((r) => r[k]);
@@ -90,10 +91,12 @@
   }
 
   col = (n) => this._columns[n];
+  get = (n) => this._columns[n];
   sum = (n) => this.col(n).sum();
   /**
    * low-level vector getter
-   * @param n
+   * @param {string} n - Column name
+   * @returns {import('../storage/ColumnVector.js').ColumnVector|undefined} - Column vector or undefined if not found
    */
   getVector = (n) => this._columns[n]?.vector;