Data Analysis

Decode a Parquet thrift footer and quantify predicate-pushdown pruning: zone-map min/max, split-block bloom filters (XXH64), dictionary ratios and encodings, with per-row-group prune-savings estimates for example WHERE clauses.

Data Processing

Remove specified values from an array using lodash _.without

Data Analysis

Class-stratified train/validation/test split or stratified k-fold for CSV/JSON datasets — seeded, reproducible, with distribution reports, leakage checks, SMOTE preview and CSV export.

Data Analysis

Forecast future periods from CSV or JSON time-series data and inspect trend, seasonal, and residual decomposition in one report

Data Analysis

Upload CSV or JSON time series data, detect anomalies with Z-Score and IQR methods, and return a chart-backed report

Data Processing

Remove duplicates from an array using lodash _.uniq

Data Processing

Remove duplicates from an array using lodash _.uniqBy with a property path

Data Processing

Remove duplicates using lodash _.uniqWith and deep equality

Data Processing

Split grouped arrays using lodash _.unzip

Data Processing

Merge multiple text files with various strategies (concatenate, interleave, etc.)

Data Processing

Format and beautify VBA code for better readability

Data Processing

Detect common log formats, extract core fields, infer field types, and export parsed logs as JSON, CSV, or SQL inserts