Expr_TODOs

Here is the set of Polars Exprs yet to be implement in Dan::Polars:

todos from https://github.com/p6steve/polars/blob/master/nodejs-polars/src/lazy/dsl.rs

• all __add__ operators

• to_string (what for)

• binary - cmps

• is, is_not, is_null, is_not_null, is_infinite, is_finite, is_nan, is_not_nan -think

• n-unique, arg_unique, unique_stable - think

• list (need to add Array dtype)

• quantile - arity

• agg_groups - internal detail

• value_counts, unique_counts - internal detail

• cast - arity

• sort_with, sort_by - arity / think

• arg_sort - internal detail

• arg_max, arg_min - think

• take - arity

• shift, shift_and_fill - arity

• fillnull, fill..., fill_nan - think

• drop_nulls, drop_nans - think

• filter - arity

• is_first, is_unique - think

• explode - array

• tail, head - arity

• slice - think

• round - arity

• floor, ceil - ^^^^ method not found in Expr

• clip - arity

• abs - ^^^^ method not found in Expr

• over - arity

• is_dupe,_and,not,_xor,_or - think

• is_in - arity

• repeat_by - arity

• pow - arity

• cumsum,cummax,cummin,cumprod - arity / daftness

• product - this is daft!

• str_parse_date, str_parse_datetime - think

• str_strip,str_rstrip,str_lstrip - think

• str_to_uppercase, str_to_lowercase - think

• str_slice,str_lengths - think

• str_contains, str_extract - think

• str_replace, str_replace_all - think

• str_hex_decode,str_hex_encode - think

• str_base64_encode, str_base64_decode - think

• str_json_path_match - think

• str_split, str_split_inclusive, str_split_exact, str_split_exact_inclusive - think

• strftime, year, month, week, weekday, day, ordinal_day, hour, minute, second, nanosecond - think

• duration_days, hours, seconds, nanoseconds, millisecondsi - think

• timestamp, dt_epoch_seconds - think

• reinterpret (Int64/UInt64) - think

• dot, mode, keep_name - huh?

• prefix, suffix - just use alias

• exclude_dtype - think

• interpolate - think

• rolling_sum,min,max,mean,std,var,median,quantile,skew - think

• lower_bound,upper_bound - internal detail

• lst_max,min,sum,mean,sort,reverse,unique,lengths,get,join,arg_min,arg_max,diff,shift,slice,eval

• rank, diff, pct_change, skew, kurtosis - arity

• str_concat - think

• cat_set_ordering - think

• reshape, shuffle - think

• cumcount - think

• to_physical - internal detail

• sample_frac - arity

• ewm_mean,std,var, - arity

• extend - arity

• all (just use col("*") - drop

• any - huh?

• struct_field_by_name,struct_rename_fields - huh?

• log - arity

• entropy - huh?

• add,sub,mul,div,true_div,rem - arity

• whenthenthen stuff - think

• dtype_cols - internal detail

• arange, range - think

• pearson, spearman_rank_corr - arity

• cov - arity

• lit - operators

• argsort_by - huh?

• concat_lst, concat_str - huh?

• min_exprs, max_exprs - huh?

• as_struct - huh?

philisophy

• align to raku methods https://docs.raku.org/type/Array

• no numpy ufuncs

• desire to offer myfunc == rust dsl => rust so lib long term