flag | class interface for working with feature flags | Frontend Framework library

 by   garbles TypeScript Version: 5.0.1 License: No License

kandi X-RAY | flag Summary

kandi X-RAY | flag Summary

flag is a TypeScript library typically used in User Interface, Frontend Framework, React Native, React applications. flag has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Feature flagging for React and Redux with strong TypeScript support
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              flag has a low active ecosystem.
              It has 374 star(s) with 28 fork(s). There are 10 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 0 open issues and 29 have been closed. On average issues are closed in 207 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of flag is 5.0.1

            kandi-Quality Quality

              flag has 0 bugs and 0 code smells.

            kandi-Security Security

              flag has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              flag code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              flag does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              flag releases are not available. You will need to build from source code and install.
              Installation instructions, examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of flag
            Get all kandi verified functions for this library.

            flag Key Features

            No Key Features are available at this moment for flag.

            flag Examples and Code Snippets

            Returns the flag value of the given flag .
            pythondot img1Lines of Code : 33dot img1License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def get_flag_value(self, wanted_flag_name):
                """Returns the value of a TensorTracer flags.
            
                Args:
                  wanted_flag_name: the name of the flag we are looking for.
            
                Returns:
                  A pair where the first element indicates if the flag is
                  
            Sets the log_device placement flag .
            pythondot img2Lines of Code : 32dot img2License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def set_log_device_placement(enabled):
              """Turns logging for device placement decisions on or off.
            
              Operations execute on a particular device, producing and consuming tensors on
              that device. This may change the performance of the operation or re  
            Match the next flag .
            pythondot img3Lines of Code : 28dot img3License : Non-SPDX (Apache License 2.0)
            copy iconCopy
            def match_next_flag(flags, pos):
                """Returns the match for the next TensorTracer flag.
            
                Args:
                   flags: a string that contains the flags.
                   pos: where in flags to start the search.
            
                Returns:
                   A pair where the first element i  
            Check if lines matching one pattern also match another
            JavaScriptdot img4Lines of Code : 41dot img4License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            #!/usr/bin/env bash
            case $BASH_VERSION in '') echo "ERROR: must be run with bash" >&2; exit 1;; esac
            
            faults_found=0
            encryption_required_re='^[[:space:]]*(username|password|key)=(.*)$'
            encryption_present_re='ENC[(][^)]+[)]'
            
            for fil
            is there a UIKit equivalent to SwiftUI's zstack?
            JavaScriptdot img5Lines of Code : 122dot img5License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            class ImageCardWithButton: UIView {
            
                lazy var cardImage: UIImageView = {
                    let image = UIImageView()
                    image.translatesAutoresizingMaskIntoConstraints = false // To flag that we are using Constraints to set the layout
                 
            Islands and Gaps algorithm does not produce a globally unique id for each island and gap
            JavaScriptdot img6Lines of Code : 20dot img6License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
              row_number() over (order by [Timestamp]) 
              - row_number() over (partition by ProductionState 
                                   order by [Timestamp])
            
              row_number() over (order by [Timestamp]) 
              + row_number() over (parti
            How can I encode RGB images into HDR10 videos in ffmpeg command-line?
            JavaScriptdot img7Lines of Code : 43dot img7License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            ffmpeg \
            
              # Some basic options
              -hide_banner \
              -loglevel verbose \
            
              # Scaling flags for the input
              # The print_info flag is very useful to debug cases when swscale is applied automatically!
              # The other flags ensure ffmpeg favors 
            T-SQL - Aggregate (MIN/MAX date) considering chronological sequence - SQL Server 2012
            JavaScriptdot img8Lines of Code : 38dot img8License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            -- rank via ascending row_number + descending row_number
            SELECT
              MIN(ValidFrom) AS ValidFrom
            , MAX(ValidTo) AS ValidTo
            , Num
            , [ID Number]
            -- , Rnk
            FROM
            (
                SELECT *
                , Rnk = ROW_NUMBER() OVER (PARTITION BY [ID Number] ORDER BY Valid
            How to display exact value from drop down?
            JavaScriptdot img9Lines of Code : 55dot img9License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            $(".js-country-list").select2({
              templateResult: formatState,
              templateSelection: formatState
            });
            
            // Template function which adds CSS flag and displays country name
            function flagTemplate(country){
              return $("
            "Drawing" over html text
            JavaScriptdot img10Lines of Code : 106dot img10License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            var canvas, ctx, flag, coords, cntnr, dot_flag;
                
                function _InitDraw() {
                  flag = false;
                  coords = {
                    pX: 0,
                    cX: 0,
                    pY: 0,
                    cY: 0
                  };
                  cntnr = {
                    minX: document.body.offsetWidt

            Community Discussions

            QUESTION

            Why second spin in Spinlock gives performance boost?
            Asked 2022-Jan-28 at 15:23

            Here is a basic Spinlock implemented with std::atomic_flag.
            The author of the book claims that second while in the lock() boosts performance.

            ...

            ANSWER

            Answered 2022-Jan-28 at 05:13

            Reading a memory address does not clear the cache line.

            Writing does.

            So in a modern computer, there is RAM, and there are multiple layers of cache "around" the CPU (they are called L1, L2 and L3 cache, but the important part is that they are layers, and the CPU is at the middle). In a multi-core system, often the outer layers are shared; the innermost layer is usually not, and is specific to a given CPU.

            Clearing the cache line means informing every other cache holding this memory "the data you own may be stale, throw it out".

            Test and set writes true and atomically returns the old value. It clears the cache line, because it writes.

            Test does not write. If you have another thread unsynchronized with this one, it reading the cache of this memory doesn't have to be poked.

            The outer loop writes true, and exits if it replaced false. The inner loop waits until there is a false visible, then falls to outer loop. The inner loop need not clear every other cpu's cache status of the value of the atomic flag, but the outer has to (as it could change the false to true). As spinning could go on for a while, avoiding continuous cache clearing seems like a good idea.

            Source https://stackoverflow.com/questions/70887350

            QUESTION

            Bubble sort slower with -O3 than -O2 with GCC
            Asked 2022-Jan-21 at 02:41

            I made a bubble sort implementation in C, and was testing its performance when I noticed that the -O3 flag made it run even slower than no flags at all! Meanwhile -O2 was making it run a lot faster as expected.

            Without optimisations:

            ...

            ANSWER

            Answered 2021-Oct-27 at 19:53

            It looks like GCC's naïveté about store-forwarding stalls is hurting its auto-vectorization strategy here. See also Store forwarding by example for some practical benchmarks on Intel with hardware performance counters, and What are the costs of failed store-to-load forwarding on x86? Also Agner Fog's x86 optimization guides.

            (gcc -O3 enables -ftree-vectorize and a few other options not included by -O2, e.g. if-conversion to branchless cmov, which is another way -O3 can hurt with data patterns GCC didn't expect. By comparison, Clang enables auto-vectorization even at -O2, although some of its optimizations are still only on at -O3.)

            It's doing 64-bit loads (and branching to store or not) on pairs of ints. This means, if we swapped the last iteration, this load comes half from that store, half from fresh memory, so we get a store-forwarding stall after every swap. But bubble sort often has long chains of swapping every iteration as an element bubbles far, so this is really bad.

            (Bubble sort is bad in general, especially if implemented naively without keeping the previous iteration's second element around in a register. It can be interesting to analyze the asm details of exactly why it sucks, so it is fair enough for wanting to try.)

            Anyway, this is pretty clearly an anti-optimization you should report on GCC Bugzilla with the "missed-optimization" keyword. Scalar loads are cheap, and store-forwarding stalls are costly. (Can modern x86 implementations store-forward from more than one prior store? no, nor can microarchitectures other than in-order Atom efficiently load when it partially overlaps with one previous store, and partially from data that has to come from the L1d cache.)

            Even better would be to keep buf[x+1] in a register and use it as buf[x] in the next iteration, avoiding a store and load. (Like good hand-written asm bubble sort examples, a few of which exist on Stack Overflow.)

            If it wasn't for the store-forwarding stalls (which AFAIK GCC doesn't know about in its cost model), this strategy might be about break-even. SSE 4.1 for a branchless pmind / pmaxd comparator might be interesting, but that would mean always storing and the C source doesn't do that.

            If this strategy of double-width load had any merit, it would be better implemented with pure integer on a 64-bit machine like x86-64, where you can operate on just the low 32 bits with garbage (or valuable data) in the upper half. E.g.,

            Source https://stackoverflow.com/questions/69503317

            QUESTION

            Typescript: deep keyof of a nested object, with related type
            Asked 2021-Dec-02 at 09:30

            I'm looking for a way to have all keys / values pair of a nested object.

            (For the autocomplete of MongoDB dot notation key / value type)

            ...

            ANSWER

            Answered 2021-Dec-02 at 09:30

            In order to achieve this goal we need to create permutation of all allowed paths. For example:

            Source https://stackoverflow.com/questions/69126879

            QUESTION

            Why am I getting a ReferenceError: AbortController is not defined in Discord.js v13?
            Asked 2021-Nov-09 at 07:07

            Today (7.8.2021) Discord.js v13 has been released. So I upgraded my previous Discord.js installation with

            npm i discord.js@latest

            and then adapted my basic index.js file to this state (I followed the Discord.js Guide):

            ...

            ANSWER

            Answered 2021-Sep-19 at 04:04
            The Issue:

            One of the prerequisites for using Discord.js v13 is that you need to use NodeJS v16.6 or higher (emphasis mine):

            v13 requires Node 16.6 or higher to use, so make sure you're up to date. To check your Node version, use node -v

            The Fix:

            The fix is to update your node version, you can confirm your current node version by running node -v. There are a variety of different ways to update node, one way is to run the following commands if you're using Linux / iOS:

            Source https://stackoverflow.com/questions/68693319

            QUESTION

            What is the "Add #[Pure] attribute" inspection in PhpStorm checking for?
            Asked 2021-Oct-06 at 18:09

            I've got a very simple FormRequest class in a Laravel project. Two methods, both of which return a simple array that's partially populated by a method, but the IDE treats them differently.

            ...

            ANSWER

            Answered 2021-Oct-06 at 17:41

            If a function only depends on other pure functions, then it is also pure. Since getPhoneNumberRules() just returns a fixed array, it's pure, so rules() is also pure.

            But messages() calls getPhoneNumberMessage(), which calls the __() function that can return a different localized message if the location state changes, so it's not pure.

            Source https://stackoverflow.com/questions/69470268

            QUESTION

            Is it possible for other x86-64 emulators on M1 to leverage the same optimizations used by Rosetta 2?
            Asked 2021-Sep-04 at 20:10

            I am curious about the vastly different performance characteristics of running x86-64 binaries on the Apple M1 platform using Rosetta 2 vs. emulation, for example what Docker Desktop currently does using QEMU.

            I understand why emulation is so slow, but an explanation for why Rosetta 2 is so fast has been detailed in this Twitter thread: https://twitter.com/ErrataRob/status/1331735383193903104

            The gist of that explanation is that under usual circumstances, arm and x86 have opposite (and incompatible) memory addressing schemes which require significant emulation overhead, but the M1 chip addresses this with a hardware optimization that allows it to access memory using both addressing schemes. Effectively, when Rosetta 2-emulated instructions are being run, a flag is set to let the processor know to use the x86-style addressing scheme.

            Assuming this explanation is reasonable (and if anyone has better-sourced reporting than the above Twitter thread I would appreciate it in the comments for inclusion), is it technically plausible that this optimization could be leveraged for full hardware emulation, for example running x86-64 Linux Docker containers, or running a full x86-64 Windows desktop virtual machine a la VMware Fusion/VirtualBox? Or, does the separate operating system layer in those scenarios preclude being able to leverage the memory ordering optimization?

            Separately, is this processor mode (flags or instructions) documented and published for 3rd-party use, or is it private to Apple only?

            ...

            ANSWER

            Answered 2021-Sep-04 at 20:09

            Not memory addressing, memory ordering. i.e. for lock-free atomics used for inter-thread synchronization - in x86, every asm load/store is acquire/release respectively. (With real x86 CPUs doing speculative early loads so performance doesn't suffer under normal conditions when a single thread is operating on memory that other threads aren't writing.)

            M1 has hardware support for a mode like that, as well as a weakly-ordered mode to run native AArch64 code most efficiently. See

            And yes, https://github.com/saagarjha/TSOEnabler is open-source software to toggle that support. But it's a kernel extension, and code signing makes it tricky to get MacOS to allow it, and you have to sign it or disable signature verification or something:

            Supposedly, you should be able to use this if you build and sign the kernel extension (disabling SIP if you aren't using a KEXT signing certificate) and drag it into /Library/Extensions. A dialog should come up to prompt you to enable the extension in the Security & Privacy preferences pane, you allow it from there and restart, and it will be installed. (If you're not seeing it, the permissions on the extension might be wrong: try a chown -R root:wheel.) In practice this can go wrong in many ways, and I have had luck by "resetting everything" and trying to install after doing the following:

            [...] see the link for the list of steps

            So yes, it's plausible that QEMU's x86 emulation could use the same hardware support that Rosetta-2's x86 emulation does. They're both x86 emulators.

            And as you say, the main issue is Apple providing public APIs for enabling the HW mode so people don't have to install this kernel module manually; I'm sure most people wouldn't want to do that. I don't know much about the software situation, I was more interested in the CPU-architecture details.

            Source https://stackoverflow.com/questions/69056518

            QUESTION

            Property body[41] of BlockStatement expected node to be of a type ["Statement"] but instead got "AssignmentExpression"
            Asked 2021-Aug-28 at 09:59

            My react native project worked fine yesterday. But this morning, after I tried to run it again, it gave me the following error:

            ...

            ANSWER

            Answered 2021-Aug-28 at 09:59

            Apparently, it may be a problem with the babel. Copy the folder @babel (specifically @babel/core) that is in the node_modules of a working project into the new project and it runs without problems.

            It may be due to an update they did a couple of hours ago.

            You can also remove the current @babel/core from the package.json and install this version npm install --save-dev @babel/core@latest.

            Or use this:
            @babel file: https://drive.google.com/file/d/1-z_4H_z4x075unZqZD41WYUwY_hsrKox/view.

            Or replace the following codes in your package.json file then npm install.

            Source https://stackoverflow.com/questions/68659516

            QUESTION

            CloudRun Suddenly got `Improper path /cloudsql/{SQL_CONNECTION_NAME} to connect to Postgres Cloud SQL instance "{SQL_CONNECTION_NAME}"`
            Asked 2021-Jun-11 at 17:27

            We have been running a service using NestJS and TypeORM on fully managed CloudRun without issues for several months. Yesterday PM we started getting Improper path /cloudsql/{SQL_CONNECTION_NAME} to connect to Postgres Cloud SQL instance "{SQL_CONNECTION_NAME}" errors in our logs.

            We didn't make any server/SQL changes around this timestamp. Currently there is no impact to the service so we are not sure if this is a serious issue.

            This error is not from our code, and our third party modules shouldn't know if we use Cloud SQL, so I have no idea where this errors come from.

            My assumption is Cloud SQL Proxy or any SQL client used in Cloud Run is making this error. We use --add-cloudsql-instances flag when deploying with "gcloud run deploy" CLI command.

            Link to the issue here

            ...

            ANSWER

            Answered 2021-Jun-11 at 17:27

            This log was recently added in the Cloud Run data path to provide more context for debugging CloudSQL connectivity issues. However, the original logic was overly aggressive, emitting this message even for properly working CloudSQL connections. Your application is working correctly and should not receive this warning.

            Thank you for reporting this issue. The fix is ready and should roll out soon. You should not see this message anymore after the fix is out.

            Source https://stackoverflow.com/questions/67595318

            QUESTION

            Efficiently find least significant set bit in a large array?
            Asked 2021-Jun-04 at 09:44

            I have a huge memory block (bit-vector) with size N bits within one memory page, consider N on average is 5000, i.e. 5k bits to store some flags information.
            At a certain points in time (super-frequent - critical) I need to find the first bit set in this whole big bit-vector. Now I do it per-64-word, i.e. with help of __builtin_ctzll). But when N grows and search algorithm cannot be improved, there can be some possibility to scale this search through the expansion of memory access width. This is the main problem in a few words

            There is a single assembly instruction called BSF that gives the position of the highest set bit (GCC's __builtin_ctzll()). So in x86-64 arch I can find the highest bit set cheaply in 64-bit words.

            But what about scaling through memory width?
            E.g. is there a way to do it efficiently with 128 / 256 / 512 -bit registers?
            Basically I'm interested in some C API function to achieve this, but also want to know what this method is based on.

            UPD: As for CPU, I'm interested for this optimization to support the following CPU lineups:
            Intel Xeon E3-12XX, Intel Xeon E5-22XX/26XX/E56XX, Intel Core i3-5XX/4XXX/8XXX, Intel Core i5-7XX, Intel Celeron G18XX/G49XX (optional for Intel Atom N2600, Intel Celeron N2807, Cortex-A53/72)

            P.S. In mentioned algorithm before the final bit scan I need to sum k (in average 20-40) N-bit vectors with CPU AND (the AND result is just a preparatory stage for the bit-scan). This is also desirable to do with memory width scaling (i.e. more efficiently than per 64bit-word AND)

            Read also: Find first set

            ...

            ANSWER

            Answered 2021-May-25 at 21:12

            You may try this function, your compiler should optimize this code for your CPU. It's not super perfect, but it should be relatively quick and mostly portable.

            PS length should be divisible by 8 for max speed

            Source https://stackoverflow.com/questions/67605508

            QUESTION

            `std::call_once` always segfaults on Clang 12 on Windows (when using libstdc++)
            Asked 2021-May-28 at 07:49

            I'm looking for a workaround, which will probably involve patching libstdc++ headers. Preserving binary compatibility is preferred but not obligatory, since I'm not using any precompiled C++ code except libstdc++.

            I want to keep the std::call_once interface, since I'm trying to compile third-party code that uses is, which I don't want to change.

            Here's my code:

            ...

            ANSWER

            Answered 2021-Apr-28 at 19:42

            One way you might work around this is to take advantage of the fact that static variables are, since C++11, initialised in a threadsafe way. Example:

            Source https://stackoverflow.com/questions/67262415

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

            Vulnerabilities

            No vulnerabilities reported

            Install flag

            This library has strong TypeScript support as of v4. In order to get that support, you must initialize the flag library before using it.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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          • npm

            npm i flag

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            https://github.com/garbles/flag.git

          • CLI

            gh repo clone garbles/flag

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            git@github.com:garbles/flag.git

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