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[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.
Dataframe may refer to: A tabular data structure common to many data processing libraries: pandas (software) § DataFrames; The Dataframe API in Apache Spark; Data frames in the R programming language; Frame (networking)
Entities in Doctrine 2 are lightweight PHP Objects that contain persistable properties. A persistable property is an instance variable of the entity that is saved into and retrieved from the database by Doctrine's data mapping capabilities via the Entity Manager - an implementation of the data mapper pattern:
PHP >= 7.2 [94] Any Yes Push-pull Yes Yes Yes Partial Yes TYPO3 Fluid Yes Yes Plugin exists Plugin exists ? Yii: PHP >= 5.4 [95] jQuery, jQuery UI, own components, plugins Yes Push-pull Yes Data Access Objects (DAO), Active Record Pattern, Plugins (incl. Doctrine 2.0) PHPUnit, Selenium: Yes ACL-based, RBAC-based, plugins PHP-based, PRADO-like ...
Elements can be removed from the end of a dynamic array in constant time, as no resizing is required. The number of elements used by the dynamic array contents is its logical size or size, while the size of the underlying array is called the dynamic array's capacity or physical size, which is the maximum possible size without relocating data. [2]
Hierarchical Data Format (HDF) is a set of file formats (HDF4, HDF5) designed to store and organize large amounts of data.Originally developed at the U.S. National Center for Supercomputing Applications, it is supported by The HDF Group, a non-profit corporation whose mission is to ensure continued development of HDF5 technologies and the continued accessibility of data stored in HDF.
Netbeans – IDE with PHP support and integration with web standards. Supports SFTP and FTP. Full support for SVN and Git since 7.2 and powerful plugin support for added functionality. SciTE – PHP syntax highlighting, compiler integration, powerful config via Lua API. Vim – provides PHP syntax highlighting, debugging. [28]
In order to effectively implement variables of such types as array structures (with indexing done by pointer arithmetic), many languages restrict the indices to integer data types [6] [7] (or other types that can be interpreted as integers, such as bytes and enumerated types), and require that all elements have the same data type and storage size.