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  2. Help:Creating tables - Wikipedia

    en.wikipedia.org/wiki/Help:Creating_tables

    Rows are similarly moved (with the ALT key pressed), or deleted. Sort as described in the previous section. Copy the table to a wiki sandbox. In Calc select the table. Copy directly from it, and then paste into the visual editor, or if that does not work, into a blank visual editor table where the first header cell has been selected.

  3. Help:Conditional expressions - Wikipedia

    en.wikipedia.org/wiki/Help:Conditional_expressions

    See also: the {{}} template. The #if function selects one of two alternatives based on the truth value of a test string. {{#if: test string | value if true | value if false}} As explained above, a string is considered true if it contains at least one non-whitespace character.

  4. Help:Tables and locations - Wikipedia

    en.wikipedia.org/wiki/Help:Tables_and_locations

    If there is other info besides the location name in those first cells, separate it with a blank line. See example table. Click on the wikitext source editing link. Click on "Advanced" in the editing toolbar. Then click on the search and replace icon on the right. Put a check in the box called "Treat search string as a regular expression."

  5. Pivot table - Wikipedia

    en.wikipedia.org/wiki/Pivot_table

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

  6. Boolean data type - Wikipedia

    en.wikipedia.org/wiki/Boolean_data_type

    In JavaScript, the empty string (""), null, undefined, NaN, +0, −0 and false [28] are sometimes called falsy (of which the complement is truthy) to distinguish between strictly type-checked and coerced Booleans (see also: JavaScript syntax#Type conversion). [29] As opposed to Python, empty containers (Arrays, Maps, Sets) are considered truthy.

  7. Propositional formula - Wikipedia

    en.wikipedia.org/wiki/Propositional_formula

    Number its rows using the binary-equivalents of the variables (usually just sequentially 0 through n-1) for n variables. Technically, the propositional function has been reduced to its (unminimized) conjunctive normal form: each row has its minterm expression and these can be OR'd to produce the formula in its (unminimized) conjunctive normal form.

  8. Matrix (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Matrix_(mathematics)

    An empty matrix is a matrix in which the number of rows or columns (or both) is zero. [ 73 ] [ 74 ] Empty matrices help to deal with maps involving the zero vector space . For example, if A is a 3-by-0 matrix and B is a 0-by-3 matrix, then AB is the 3-by-3 zero matrix corresponding to the null map from a 3-dimensional space V to itself, while ...

  9. Unique key - Wikipedia

    en.wikipedia.org/wiki/Unique_key

    No two distinct rows or data records in a database table can have the same data value (or combination of data values) in those candidate key columns since NULL values are not used. Depending on its design, a database table may have many candidate keys but at most one candidate key may be distinguished as the primary key.