DEV Community: Cristian Prochnow

Success from Form not working ExtJS v4

Cristian Prochnow — Fri, 27 May 2022 12:59:47 +0000

Issue

While working with a requisition in ExtJS, I found myself in a strange situation. My PHP backend was returning correct response, like this:

{
  "success": true,
  "id": "<some_id>"
}

For success

And...

{
  "success": false,
  "msg": "<error_msg>"
}

For failure

But, even with something like this, in correct structure, my code was not working. In submit function from form, the form to wait for requisition is putting success and failure listeners in configuration object from function, like this:

form.getForm().submit({
  ...,
  success : function(me, action){
    // code...
  },
  failure : function(me, action){
    // code...             
  }
});

Solution

And, what is the answer for this big question? It is simple!

The form request listeners work specifically with response format. So, if request is success, insert "success": true in your JSON response object. Otherwise, insert "success": false, that function will recognize that must call what is passed in failure configuration.

Conclusion

In forms like this, simply follow this principle:

To call what have been passed in success attribute in the configuration object from submit():

{
  "success": true,
  ...
}

To call what have been passed in failure attribute in the configuration object from submit():

{
  "success": false,
  ...
}

The most easy and fast way to turn an integer number into binary

Cristian Prochnow — Mon, 29 Mar 2021 21:33:01 +0000

Here we go...

Even if you don't care much about binary numbers and this deeper knowledge from how the machine works, you surely even have asked yourself a simple question: "What the heck is going on here?!".

And at first sight all this processes under the hood can be a few scaring or a big hassle, but now I will show you that can be simpler than you ever saw turn integer numbers into binary — and vice versa.

Step by step 💡

Define a number you desire

At this case, I will choose a random number, just for testing. So I will define 217 as my first number — let's get started with a big number.

Get numbers from binary sequence

Each byte have 8 bits. Each bit is worth to a determined value into the queue, starting from right to left.

2⁷	2⁶	2⁵	2⁴	2³	2²	2¹	2⁰
128	64	32	16	8	4	2	1

Separate the number in several sums results

Now it is the time to separate the number into sums that fill into binary sequence values. This process have to consider the sequence left-to-right from numbers, as the example below

128 ⇒ 64 ⇒ 32 ⇒ 16 ⇒ 8 ⇒ 4 ⇒ 2 ⇒ 1

To do this, let's get 217 and separate into several operations, always separating the rest of the operations into new sum operations and considering the next number from sequence as target:

217 = 128 + 89
89 = 64 + 25
25 = 16 + 9
9 = 8 + 1

And it's done. Now we have the numbers from the binary queue (128 ⇒ 64 ⇒ 32 ⇒ 16 ⇒ 8 ⇒ 4 ⇒ 2 ⇒ 1) that were within the initial integer number.

Put `1` at number that are in the sequence

Now, get all the numbers from the sequence, and set each space with 0. And then, with numbers that you find out within the desired number, fill 0's cells with 1.

128	64	32	16	8	4	2	1
1	1	0	1	1	0	0	1

It's done 🎉! Now we know that 217, in binary format, is 11011001.

Questions

But, if I had a binary number instead?

Then, you can do reverse engineering and just replace the spaces of sequence above with your binary number. And then, sum the numbers that have been filled with 1.

What I could do with a number bigger than 256?

Build the same method, but increase the exponent of 2 in the sequence. So, if the maximum at this example was 2^7, you can add one more sequence to the left side, with the biggest value as
2^15.

For example, 2^7 + 2^6 + 2^5 + 2^4 + 2^3 + 2^2 + 2^1 + 2^0 was the previous sequence, and the new with be 2^15 + 2^14 + 2^13 + 2^12 + 2^11 + 2^10 + 2^9 + 2^8 + 2^7 + 2^6 + 2^5 + 2^4 + 2^3 + 2^2 + 2^1 + 2^0. And the binary number will be at this 00000000 00000000(16 bits) instead of 00000000(8 bits).

Conclusion

Computers' processes can be easier to understand than they seem. So, with this new quick tip, feel free to give your feedback and bring yet more value to discussion.

Made with 💚 by Cristian. Enjoy it!

⚡ How to become faster in Git CLI

Cristian Prochnow — Mon, 20 Jul 2020 16:36:04 +0000

👋🏻 Hey, there

First of all, get your favorite drink, prepare your .gitconfig, and come with me through this huge valley called "Git"...

Git is constantly present in our routine as developers, and a good approach to use this tool is essential. For this case — and any else — there is Git Alias.

🤔 What is it?

A Git Alias is simply as a shortcut to other command used in Git CLI. In one fast and abstract comparation, the complete command from Git looks like the functionality of Copy something using the right button from mouse, and a Git Alias is the Ctrl + C shortcut.

⁉ Why?

Because you are able to save time using this shortcuts, and with specifics settings some commands that are naturally long will be reduced to one keyword.

With a simple example, you will be able to turn this:

git remote add origin https://github.com/user/repository.git

Into this:

git remo https://github.com/user/repository.git

⚠ In this case, I have set remo as a alias from remote add origin, but the name of it can be any word you wish.

🚀 Here we go...

Find the configuration file

First of all, it is necessary to find the configuration file from Git, in your machine.

Windows

# To set the config for one user only
C:\Users\{your_user}\.gitconfig

# To set the config for all the users from machine
C:\Program Files\Git\etc\gitconfig

Unix

# To set the config for one user only
~/.gitconfig
# or
~/.config/git/config

# To set the config for all the users from machine
/etc/gitconfig

Set the Aliases

Open the file with an IDE by your preference, and start to set shortcut for commands you need. Before set the first keyword, type [alias], indent, and then you are able to set shortcuts. For example:

[alias]
  ad = add .
  remo = remote add origin
  rem = remote add

⚡ Aliases I use

To save time, you can copy and paste the aliases I use, and then change each of them by your preference.

[alias]
  ad = add .
  remo = remote add origin
  rem = remote add
  ci = commit -m
  pm = push origin master
  po = push origin
  plm = pull origin master
  pl = pull origin
  co = checkout
  cm = checkout master
  cb = checkout -b
  st = status -sb
  sf = show --name-only
  lg = log --pretty=format:'%Cred%h%Creset %C(bold)%cr%Creset %Cgreen<%an>%Creset %s' --max-count=30
  incoming = !(git fetch --quiet && git log --pretty=format:'%C(yellow)%h %C(white)- %C(red)%an %C(white)- %C(cyan)%d%Creset %s %C(white)- %ar%Creset' ..@{u})
  outgoing = !(git fetch --quiet && git log --pretty=format:'%C(yellow)%h %C(white)- %C(red)%an %C(white)- %C(cyan)%d%Creset %s %C(white)- %ar%Creset' @{u}..)
  unstage = reset HEAD --
  undo = checkout --
  rollback = reset --soft HEAD~1

🏁 Conclusion

Git Alias is a huge friend of our productivity, and surely will help you in your daily commits. For more information about this tool, check the official documentation, or the complete guide of Git.

This code I use is an adaptation from this one.

The fastest way to train Coding 🚀

Cristian Prochnow — Thu, 16 Jul 2020 12:42:29 +0000

👋🏻 Hey, there

First of all, get your favorite drink, prepare your IDE, and come with me through this huge valley called "programming"...

At start of our life as developers, the desire for knowledge about coding is huge, but sometimes the anxiety fill us and all this hype flush away from us. So, to solve this brief problem, find a place to practice coding is essential. For this, there is Codewars.

🤔 What is Codewars?

This is a place where you are able to make several algorithms, since easier of them, until the hardest of all. At each level of evolution, new privileges are reached and then new functionalities become unlocked. And not only this, but some these algorithms also are used in some interviews of huge companies that are in this category from technology.

⚙️ How this tool works?

All the process is simple and fast:

🚪 Sign Up/Log In

It's possible do this using your account from GitHub.
⚙️ Define your preferences of coding language
▶️ Choose a algorithm along several others
Start coding! 🎉

ℹ️ Why?

🎚️ Several levels of difficulty

With this, any type of developer, in any level of knowledge about coding, can practice and train your abilities.
🔀 Many ways to solve each problem

After each challenge that you conclude, the solution used by others users are shown, so affording you to know so many others logical insights about that problem.
💬 Direct contact with community

Build and solve challenges. From developers, to developers.

DEV Community: Cristian Prochnow

Success from Form not working ExtJS v4

Issue

Solution

Conclusion

The most easy and fast way to turn an integer number into binary

Here we go...

Step by step 💡

Define a number you desire

Get numbers from binary sequence

Separate the number in several sums results

Put 1 at number that are in the sequence

Questions

Conclusion

⚡ How to become faster in Git CLI

👋🏻 Hey, there

🤔 What is it?

⁉ Why?

🚀 Here we go...

Find the configuration file

Windows

Unix

Set the Aliases

⚡ Aliases I use

🏁 Conclusion

The fastest way to train Coding 🚀

👋🏻 Hey, there

🤔 What is Codewars?

⚙️ How this tool works?

ℹ️ Why?

🌿 Alternatives

Put `1` at number that are in the sequence