omt | A cache-efficiency weight balanced binary tree | Key Value Database library

 by   BohuTANG C Version: Current License: GPL-2.0

kandi X-RAY | omt Summary

kandi X-RAY | omt Summary

omt is a C library typically used in Database, Key Value Database applications. omt has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

OMT is short for Order Maintenance Tree, which is dreamed up by Tokutek, and used in TokuDB. It's a weight balanced binary tree, each node maintains the weights of its left and right subtrees. OMT having better CPU cache efficiency than skiplist (it's very cool as you improve it to vEB layout). For more details, please see Cartesian Tree: After rebalance: /* * * (key-5) * / * (key-4) (key-7) * / / * (key-1) (key-6) (key-71) * */.
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            kandi-support Support

              omt has a low active ecosystem.
              It has 52 star(s) with 8 fork(s). There are 5 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              omt has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of omt is current.

            kandi-Quality Quality

              omt has no bugs reported.

            kandi-Security Security

              omt has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              omt is licensed under the GPL-2.0 License. This license is Strong Copyleft.
              Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

            kandi-Reuse Reuse

              omt releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.

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            omt Key Features

            No Key Features are available at this moment for omt.

            omt Examples and Code Snippets

            No Code Snippets are available at this moment for omt.

            Community Discussions

            QUESTION

            Creating a worksheet from two existing worksheets with VBA
            Asked 2021-Jun-07 at 12:52

            I would like to copy some columns data from two different sheets. Columns are not the same since this information comes from two different data bases.

            The highlighted columns are the information I need to copy into the new Database:

            In this database there are two green highlighted columns.
            If there's id data on column "M" I take this if not I copy from column "F":

            My code works. The problem is from the moment I load an important amount of data, Excel crashes.

            ...

            ANSWER

            Answered 2021-Feb-26 at 16:23

            Some suggestions below. You do not need to loop for most of the copying, and as Nathan points out you could switch to assigning Value directly as that would be faster, as long as you don't also need to copy formatting.

            Source https://stackoverflow.com/questions/66370497

            QUESTION

            What is the relationship corresponding to implementation inheritance in UML?
            Asked 2020-Dec-20 at 16:22

            What is the relationship corresponding to implementation inheritance (realized with private inheritance in C++) in the current UML specification (2.5.1, December 2017)?

            Not to be confused with interface inheritance (subtyping) which corresponds in UML to the interface realization relationship denoted by a dashed line and hollow triangle, nor with implementation and interface inheritance (subclassing) which corresponds in UML to the generalization relationship denoted by a solid line and hollow triangle.

            Note. — The book Design Patterns by Erich Gamma et al. published in 1994 (before UML) whose class diagrams are based on OMT (an ancestor of UML) used informally a solid line and hollow triangle with an “(implementation)” modifier for denoting implementation inheritance:

            Figure. — OMT class diagram of the class Adapter design pattern.

            ...

            ANSWER

            Answered 2020-Dec-20 at 02:39
            GoF terminology

            GoF proposes some terminology (p. 13-15) which you seem to have adopted:

            • an object packages data (attributes) and procedures (operations) that operate on these data.
            • the interface to an object is the set of its operations’ signatures.
            • a type is the name of a particular interface.
            • a subtype is a type that is a superset of another type.
            • a supertype is a type that is a subset of another type.
            • the implementation of an object is the set of its attributes and operations’ implementations.
            • a class defines an object’s interface and implementation.
            • a subclass defines a class that is a superset of another class.
            • a superclass defines a class that is a subset of another class.
            • inheritance in this understanding corresponds to reusing an implementation.

            This understanding is driven by reuse, the main topic of their book: types are just reuse of an interface, whereas classes are reuse of an implementation. This view is reductionist:

            • Nothing is said about the promises and expectations behind an interface (e.g. that I can only pop() from the stack if I have push()ed something on it first). It is just about the ability to accept the requests defined by the interface.
            • The distinction between an abstract class (which defines an interface without providing an implementation) and an interface is not at all clarified.

            The last point is perfectly illustrated in your graphical example.

            • In the GoF narrative, Target and Adaptee are both defined as interface (see p. 141, section "participants"), whereas Adapter implements these interfaces.
            • Yet, in the schema, Target is represented as an abstract class (see p. 365) and Adapter’s Request() is implemented by calling SpecificRequest() but it is not shown that Adapter must implement SpecificRequest() as well.
            • Finally, GoF explains that Adapter is a subclass of Adaptee, which seems somewhat inconsistent.
            UML perspective

            The UML definition of an interface is much closer to what Liskov would call a type:

            An Interface […] represents a declaration of a set of public Features and obligations that together constitute a coherent service. An Interface specifies a contract […]. The obligations associated with an Interface are in the form of constraints (such as pre- and postconditions) or protocol specifications, which may impose ordering restrictions on interactions through the Interface. Interfaces may not be instantiated. Instead, an Interface specification is implemented or realized […].

            Classes define sets of features, may implement interfaces and can be instantiated.

            What you call interface inheritance is ambiguous:

            • If you mean a class that implements the interface, it is interface realization, denoted by a dotted line with a hollow triangle on the side of the interface to be realized.
            • If you mean an interface that inherits another interface (subtyping), it is interface specialization, denoted by a plain line with a hollow triangle on the side of the more general interface.

            What you call implementation and interface inheritance is ambiguous, since it is not clear if inheritance applies only to interface or also to implementation:

            • If you mean the implementation of an existing interface with a class, it is interface realization with a dotted line with a hollow triangle on the side of the interface to be realized.
            • If you mean the simultaneous inheritance of both an interface and their implementation, then it is class specialization, denoted by a plain line with a hollow triangle on the side of the more general class.

            If with implementation inheritance you were thinking of inheriting the implementation without inheriting the interface, i.e. private inheritance, then there is nothing special foreseen in UML, and you have to translate your implementation intent into UML concepts, as explained for example in this SO question.

            Now to illustrate the graphical notation, here is the class Adapter pattern as described in GoF using the participant roles:

            And here is a more logic diagram, if considering that Adaptee is in reality an existing implementation that needs to be adapted:

            Source https://stackoverflow.com/questions/65330629

            QUESTION

            Incorrect used disk space percentage when calculated using Ansible
            Asked 2020-Mar-25 at 17:30

            Can you please tell me why is the percentage of a used drive (disk space) shows 28.5% with ansible while the df -k shows only 19% used on remote Linux host?

            Here is my playbook code:

            ...

            ANSWER

            Answered 2020-Mar-25 at 17:30

            The question is not really about ansible as you would have the same problem with manual calculation.

            To get the exact same percentage as df, you'll have to add the reserved bloc count of the partition. You can get this value for example with tune2fs. In your case:

            Source https://stackoverflow.com/questions/60848472

            QUESTION

            how to convert select statement to update statement
            Asked 2020-Feb-12 at 05:41

            I'm unable to convert the select query to the update statement.

            ...

            ANSWER

            Answered 2020-Feb-12 at 05:41

            You can use such an Update statement containing with .. as clause :

            Source https://stackoverflow.com/questions/59264406

            QUESTION

            Rollupjs Module didn't register its module
            Asked 2019-Oct-01 at 09:47

            I have a gulp task that runs rollup, compiles typescript and generates modules for dynamic imports:

            ...

            ANSWER

            Answered 2019-Oct-01 at 09:47

            I have resolved my problem via the beautiful Rich Harris shimport:

            In the HTML I've done this:

            Source https://stackoverflow.com/questions/58135347

            QUESTION

            what is the method to add vocabulary in hunspell pakckage
            Asked 2019-Jul-15 at 10:50

            I have a list of word that I want to correct using unspell but in these words, there could be some specific word that hunspell didn't know and that he has to not correct(the list is not defined and too long to be added by hand)

            what method do I could use to solve that?

            I already tried to find and upgrade the dictionary

            here is a list of the word :

            ...

            ANSWER

            Answered 2019-Jul-15 at 10:50

            Use dictionary() with add_words parameter -

            Source https://stackoverflow.com/questions/57037343

            QUESTION

            subquery uses ungrouped column "omt.actualendtime" from outer query
            Asked 2019-Mar-07 at 12:34

            Following is the query

            ...

            ANSWER

            Answered 2019-Mar-07 at 12:34

            QUESTION

            Qt How to change selected text char by char
            Asked 2018-Jun-08 at 13:35

            I'm creating a simple Text Editor in Qt.
            I'm able to edit selected text and make it, for example, bold or underline or both. The problem is when the selected text is partially bold, normal or other. So the only way to make it good is to take the selected text and edit it char by char (if it is already cursive and i want it bold too, the char must be both).

            This is part of my code in which i can change selected text into bold:

            ...

            ANSWER

            Answered 2018-Jun-08 at 13:35

            Perhaps you can use QTextCursor::mergeCharFormat(const QTextCharFormat & modifier)? http://doc.qt.io/qt-5/qtextcursor.html#mergeCharFormat

            Example:

            Source https://stackoverflow.com/questions/50757644

            QUESTION

            Can Nominatim use OpenMapTile's database?
            Asked 2018-May-25 at 07:02

            If we're using OpenMapTiles, can we point Nominatim to OMT's database, or are the schemas different?

            It is taking us quite a long time to processes the global OSM dataset for Nominatim, but we could save ourselves some time/storage/etc. if both products can share the same Postgres database.

            ...

            ANSWER

            Answered 2018-May-25 at 07:02

            The geocoder Nominatim uses a different database scheme than a tile server. Geocoders and tile servers need slightly different data. Furthermore, for maximum performance, the data has to be pre-processed in different ways. That's why you can't use the same database for both.

            Source https://stackoverflow.com/questions/50511779

            QUESTION

            How to create a project sheet via the python SDK
            Asked 2018-Apr-05 at 16:22

            I'm trying to create new project sheets in a folder, however I can't find a way to ensure the sheet is a project sheet.

            Here is my code so far:

            ...

            ANSWER

            Answered 2018-Apr-05 at 16:17

            Create the sheet from a template, either using the global project template or a user defined template if you want to customize.

            Source https://stackoverflow.com/questions/49662143

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install omt

            You can download it from GitHub.

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