Performance Benchmarking What it is: Testing a system under certain reproducible conditions Why do it: To establish a baseline which can be tested against regularly to ensure a system’s performance remains constant, or validate improvements as a result of change Answers the question: “How is my app performing, and how does that compare with the past?”

Nix is a purely functional package manager. This means that it treats packages like values in purely functional programming languages such as Haskell — they are built by functions that don’t have side-effects, and they never change after they have been built.

Configuration as Code vs. Infrastructure as Code Some treat CAC and infrastructure as code (IAC) as the same thing. They’re not, and there’s a reason we have two distinct terms.

If you like the straight forward and effective nature of Strong Parameters

You might be thinking––"a tool that allows me to write semantic and reusable queries? Sounds like Active Record". It's absolutley true that Active Record already provides a powerful query tool kit. But what happens when even simple queries stretch the bounds of Active Record's capabilities?

login shell: A login shell logs you into the system as a specific user, necessary for this is a username and password. When you hit ctrl+alt+F1 to login into a virtual terminal you get after successful login: a login shell (that is interactive). Sourced files: /etc/profile and ~/.profile for Bourne compatible shells (and /etc/profile.d/*) ~/.bash_profile for bash /etc/zprofile and ~/.zprofile for zsh /etc/csh.login and ~/.login for csh non-login shell: A shell that is executed without logging in, necessary for this is a current logged in user. When you open a graphic terminal in gnome it is a non-login (interactive) shell. Sourced files: /etc/bashrc and ~/.bashrc for bash interactive shell: A shell (login or non-login) where you can interactively type or interrupt commands. For example a gnome terminal (non-login) or a virtual terminal (login). In an interactive shell the prompt variable must be set ($PS1). Sourced files: /etc/profile and ~/.profile /etc/bashrc or /etc/bash.bashrc for bash non-interactive shell: A (sub)shell that is probably run from an automated process you will see neither input nor output when the calling process don't handle it. That shell is normally a non-login shell, because the calling user has logged in already. A shell running a script is always a non-interactive shell, but the script can emulate an interactive shell by prompting the user to input values. Sourced files: /etc/bashrc or /etc/bash.bashrc for bash (but, mostly you see this at the beginning of the script: [ -z "$PS1" ] && return. That means don't do anything if it's a non-interactive shell). depending on shell; some of them read the file in the $ENV variable.

COMMAND EXECUTE BASHRC -------------------------------- bash -c foo NO bash foo NO foo NO rsh machine ls YES (for rsh, which calls `bash -c') rsh machine foo YES (for shell started by rsh) NO (for foo!) echo ls | bash NO login NO bash YES

Do not start ssh-agent from .bashrc or .zshrc, since these files are executed by each new interactive shell. The place to start ssh-agent is in a session startup file such as .profile or .xsession.

Unlike similar tools that are scheduled to take backups at a fixed time of the day, Timeshift is designed to run once every hour and take snapshots only when a snapshot is due. This is more suitable for desktop users who keep their laptops and desktops switched on for few hours daily. Scheduling snapshots at a fixed time on such users will result in missed backups since the system may not be running when the snapshot is scheduled to run. By running once every hour and creating snapshots when due, Timeshift ensures that backups are not missed.

If you need a tool to backup your documents and files please take a look at the excellent BackInTime application which is more configurable and provides options for saving user files.

Timeshift is similar to applications like rsnapshot, BackInTime and TimeVault but with different goals.

If you want to keep several days worth of backups, your storage requirements will grow dramatically with this approach. A tool called rdiff-backup, based on rsync, gets around this issue.

Agreed, I use rdiff-backup because I found my rsync backups were getting cluttered with old files, and sometimes the lack of versioned backups was problematic. I'm a big fan of rdiff-backup. I don't think it actually leverages rsync, as such, but librsync. It's a great tool.

I think that rsync is great but tools like dar, attic, bup, rdiff-backup or obnam are better. I use obnam, as it does "snapshot backups" with deduplication.

There are many options for performing backups. Most Linux distributions are provided with one or more open source programs specially designed to perform backups. There are many commercial options available as well. But none of those directly met my needs so I decided to use basic Linux tools to do the job.

While there are so many tools to backup your systems, I find this method super easy and convenient, at least to me. Also, this method is way better than disk cloning with dd command. Because It doesn’t matter if your hard drive is different size, or use different filesystem.

browser: points to browser-specific untranspiled code

ES modules enable tree-shaking (which, in general, is impossible with CommonJS modules).

I love this library. Migrated from CRA to nwb. That didn't work out. Neutrino was very easy to setup with almost the exact setup I had with CRA but with far more customization. Again, thank you. Have a good day

Fetch() provides similar functionality through the AbortController interface. It’s not as simple as the Axios version, though:

Here are a few common cases where you might want to try something else:

However, in this case you would lose the possibility to render something in between. You are strictly coupled to the higher-order component's render method. If you need to add something in between of the currency components, you would have to do it in the higher-order component. It would be quite similar as you have done it previously by rendering the currency components straight away in the Amount component. If using a render prop component instead, you would be flexible in your composition.

For the sake of completeness, the following code demonstrates that the problem could be solved with a higher-order component (HOC) as well:

We've worked very hard to make Reason look like JS while preserving OCaml's great semantics & types.

Revery is like flutter in that it does not use native widgets.

We might have some dirty mutable objects for performance - but our high-level API should be purely functional. You should be able to follow the React model of modelling your UI as a pure function of application state -> UI.

REST and GraphQL are wonderful tools to create an API that is meant to be consumed by third parties. Facebook's API, for example, is consumed by ~200k third parties. It is no surprise that Facebook is using (and invented) GraphQL; a GraphQL API enables third parties to extensively access Facebook's social graph enabling them to build all kinds of applications. For an API with that many consumers, GraphQL is the fitting tool. But, to create an internal API (an API developed and consumed by code written by the same organization), RPC offers a simpler and more powerful alternative. Large companies, such as Netflix, Google and Facebook, are starting to replace REST/GraphQL with RPC for their internal APIs. Most notably with gRPC which is getting popular in the industry.

RPC is increasingly used to create backend APIs as most are internal: most of the time, a backend API is consumed only by frontends developed within the same organization. In general, REST and GraphQL are the right tools if you want to create an API consumed by code written by third parties and RPC is the right tool if you want to create an API consumed by code written by yourself / your organization.

Whereas Webpack bundles all our JavaScript source code files into one bundle (including custom configured build steps), Babel enables us to use recent JavaScript features that are not supported by many browsers yet.

Spectrum is more like a forum than a chat, so the obvious one would be Discourse

I'm super stoked about Vue.js though...I'm kind of over Angular at this point since it left a bad taste in my mouth last year (it's a much larger framework and the 'official' build system isn't even being used anymore by programmers)

I'm doing a newer project in Vue.js because it looks much lighter than Angular and just awesome all around

Been there, done that. Vue.js takes the best ideas form Angular (and some from React), without putting you in ZoneAwareError hell.

useMemo is similar to useCallback except it allows you to apply memoization to any value type (not just functions). It does this by accepting a function which returns the value and then that function is only called when the value needs to be retrieved

The indicators are summarized in Table 4 [1,24,34,39,47,53,54,55,56,57,58,59,60,61,62,63] and discussed individually, with graphics where relevant to make key comparisons clearer.

I’m here to convince you that when wrapped in a 4 line custom hook, useState can be just as powerful as, if not more powerful than, useReducer when managing complex state.

Let's briefly look at the libraries, use cases, and factors that might help in deciding which is right for you. Here's a high-level decision tree: If you want fast and easy setup and integration, then component-playground may be the ticket! If you want a smaller bundle, SSR, and more flexibility, then react-live is for you! Here are the various factors at play:

It is this combination of features that also makes HyperCard a powerful hypermedia system. Users can build backgrounds to suit the needs of some system, say a rolodex, and use simple HyperTalk commands to provide buttons to move from place to place within the stack, or provide the same navigation system within the data elements of the UI, like text fields. Using these features, it is easy to build linked systems similar to hypertext links on the Web.[5] Unlike the Web, programming, placement, and browsing were all the same tool. Similar systems have been created for HTML but traditional Web services are considerably more heavyweight.

These nine categories are then organised along a spectrum that identifies the relative potential capacity for transformative practice and professional autonomy inherent in each, the premise of this being that such conditions require teachers to be able to articulate their own conceptions of teaching and be able to select and justify appropriate modes of practice.

Good folk, I have no coin; To take were to purloin: I have no copper in my purse, I have no silver either, And all my gold is on the furze

It would be fair to characterize Beaker as “a novel application of Bittorrent’s concepts to the Web platform.” If Beaker had been started in 2006, it would be using Bittorrent as its primary protocol. However, as of 2016, new variants have appeared with better properties.

They are one and the same state.

Emmett Till died because a white woman lied about their brief interaction

And, in general, to observe with intelligence & faithfulness all the social relations under which he shall be placed.

Statics, respect matter generally, in a state of rest, and include Hydrostatics, or the Laws of fluids particularly, at rest or in equilibrio Dynamics, used as a general term include Dynamics proper, or the Laws of solids in Motion and Hydrodynamics, or Hydraulics, those of fluids in Motion Pneumatics teach the theory of air, its Weight, Motion, condensation, rarifaction &c Acoustics or Phonics, the theory of sound Optics the Laws of Light & vision Physics or Physiology in a general sense, mean the doctrine of the Physical objects of our senses

a happy married future can hold more of the same, not the wholesale change Elizabeth anticipates

Mongols

f such women as are here described have t-.... once existed, be no longer astonished then, my s brethren and friends, that God at this eventful pe-5~ riod should raise up your own females to strive, ~' by their example both in public and private, to · assist those who arc endeavoring stop the strong current of prejudice that flows so profusely against us at present. No longer ridicule their ef-forts, it will be counted for sin. For God makes use of feeble means sometimes, to bring about his most exalted purposes.

Just as young children learn by comparison,

comparison

affairs

Cuba has a one-party system; the United States is a multi-party democracy.  Cuba has a socialist economic model; the United States is an open market.  Cuba has emphasized the role and rights of the state; the United States is founded upon the

If you go to http://via.hypothes.is/bavatuesdays.com/a-long-short-history-of-reclaim-hosting/, you'll see eight line-by-line comments to his post.

COMPARE MAKERBOT REPLICATOR 3D PRINTERS

Comparing AES to CPR Both AES and CPR have advantages and disadvantages in the context of MOOCs. Figure 1 offers a comparison of generalized AES methods of assessment and CPR

Now compare this to the stack. The stack is like the heap in that it is a big block of memory with a “high water mark”. But what makes it a “stack” is that the memory on the bottom of the stack always lives longer than the memory on the top of the stack; the stack is strictly ordered. The objects that are going to die first are on the top, the objects that are going to die last are on the bottom. And with that guarantee, we know that the stack will never have holes, and therefore will not need compacting. We know that the stack memory will always be “freed” from the top, and therefore do not need a free list. We know that anything low-down on the stack is guaranteed alive, and so we do not need to mark or sweep.