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A spreadsheet's concatenate ("&") function is used to assemble a complex text string—in this example, XML code for an SVG "circle" element. In formal language theory and computer programming, string concatenation is the operation of joining character strings end-to-end. For example, the concatenation of "snow" and "ball" is "snowball".
[4]: 114 A DataFrame is a 2-dimensional data structure of rows and columns, similar to a spreadsheet, and analogous to a Python dictionary mapping column names (keys) to Series (values), with each Series sharing an index. [4]: 115 DataFrames can be concatenated together or "merged" on columns or indices in a manner similar to joins in SQL.
This template can be used to control the width of an item's prefix in a vertical list. Although most applicable to lists sorted by date, the template technically can be used to control the width of any text, since it's basically a span tag wrapped in a template.
A monopoly produced through vertical integration is called a vertical monopoly: vertical in a supply chain measures a firm's distance from the final consumers; for example, a firm that sells directly to the consumers has a vertical position of 0, a firm that supplies to this firm has a vertical position of 1, and so on. [2]
The flash of light is shown as the 45° red lines. The points at which the two light flashes hit the ends of the train are at the same level in the diagram. This means that the events are simultaneous. In the second diagram, the two ends of the train moving to the right, are shown by parallel lines.