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  2. Off-by-one error - Wikipedia

    en.wikipedia.org/wiki/Off-by-one_error

    Off-by-one errors are common in using the C library because it is not consistent with respect to whether one needs to subtract 1 byte – functions like fgets() and strncpy will never write past the length given them (fgets() subtracts 1 itself, and only retrieves (length − 1) bytes), whereas others, like strncat will write past the length given them.

  3. Row- and column-major order - Wikipedia

    en.wikipedia.org/wiki/Row-_and_column-major_order

    More generally, there are d! possible orders for a given array, one for each permutation of dimensions (with row-major and column-order just 2 special cases), although the lists of stride values are not necessarily permutations of each other, e.g., in the 2-by-3 example above, the strides are (3,1) for row-major and (1,2) for column-major.

  4. Help:Table - Wikipedia

    en.wikipedia.org/wiki/Help:Table

    Column 3<br>(row 1 cell ... width of the widest text element in a column's cells, follow this example. ... applied to only the first line of the table ...

  5. Data cleansing - Wikipedia

    en.wikipedia.org/wiki/Data_cleansing

    Data cleansing may also involve harmonization (or normalization) of data, which is the process of bringing together data of "varying file formats, naming conventions, and columns", [2] and transforming it into one cohesive data set; a simple example is the expansion of abbreviations ("st, rd, etc." to "street, road, etcetera").

  6. Row and column spaces - Wikipedia

    en.wikipedia.org/wiki/Row_and_column_spaces

    At this point, it is clear that the first, second, and fourth columns are linearly independent, while the third column is a linear combination of the first two. (Specifically, v 3 = −2v 1 + v 2.) Therefore, the first, second, and fourth columns of the original matrix are a basis for the column space:

  7. Pivot table - Wikipedia

    en.wikipedia.org/wiki/Pivot_table

    Column labels are used to apply a filter to one or more columns that have to be shown in the pivot table. For instance if the "Salesperson" field is dragged to this area, then the table constructed will have values from the column "Sales Person", i.e., one will have a number of columns equal to the number of "Salesperson". There will also be ...

  8. BED (file format) - Wikipedia

    en.wikipedia.org/wiki/BED_(file_format)

    Thus, the nucleotide with the coordinate 1 in a genome will have a value of 0 in column 2 and a value of 1 in column 3. A thousand-base BED interval with the following start and end: chr7 0 1000 would convert to the following 1-based "human" genome coordinates, as used by a genome browser such as UCSC: chr7 1 1000

  9. B-tree - Wikipedia

    en.wikipedia.org/wiki/B-tree

    The auxiliary indices have turned the search problem from a binary search requiring roughly log 2 N disk reads to one requiring only log b N disk reads where b is the blocking factor (the number of entries per block: b = 100 entries per block in our example; log 100 1,000,000 = 3 reads).