rb | Turns Ruby into a versatile command line utility | Command Line Interface library
kandi X-RAY | rb Summary
kandi X-RAY | rb Summary
With 9 lines of Ruby replace most of the command line tools that you use to process text inside of the terminal. Clone this repo and copy the rb file to somewhere in your path (or just copy and paste the above). With this you can use ruby as a command line utility much more ergonomically than invoking it the standard way. There's only one switch -l which runs your code on each line separately. Otherwise you get an Enumerator that returns the lines of stdin. It's instance_evaled so some methods need self to work, eg. self[-1].
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Trending Discussions on rb
QUESTION
i have this input file.. I need to remove the duplicated rows in column 13 but I have a problem with the data that contains a "-" why does it not remove them
input
...ANSWER
Answered 2021-Jun-16 at 01:50If your sample input is accurate, some of your column 13 contain trailing whitespace. If you want to treat them as being the same value, you can trim it.
For example, before using column 13, you could do:
QUESTION
My character can move into other objects only when he moves in both directions. I left the my character code and photo of my question here. I would be happy if you help.and i also played with all the colliders and filters of my character and the floor my character is in but still not resolved
...ANSWER
Answered 2021-Jun-15 at 16:21Add collider to both character and objects. Make sure the character is placed correctly placed in the scene. Also make sure that character has rigidbody.
QUESTION
I need help uploading a file directly from an HTML form to an API. I've seen this being done for remote URLs, but I don't know how to do this for local files? I tried writing this, but its not working:
...ANSWER
Answered 2021-Jun-15 at 09:58The request.files['file']
is an instance of a FileStorage class. refer to api, you cannot use with open(uploadmedia, 'rb') as file:
.
try using stream attribute :
QUESTION
how do i add N4ID which contains 1 to N3ID which also contains it
my code
...ANSWER
Answered 2021-Jun-15 at 09:37As the comments mention you should refer to type casting. In your example you try to add a string with an integer. This is not possible.
You can directly do it by casting N3ID
to int or you can add some type checks before you proceed with your addition.
In the first case you can simply do int(N3ID)
and then add your number.
If you want to perform type check there are a couple of ways to do it.
- You can check the type of your var with
type(N3ID)
or(isinstance(N3ID, int))
and then decide accordingly how to proceed. - You can check if your var can be cast in integer with
isdigit()
method.
isinstance and type docs can be found here
isdigit is a string method can be found here
QUESTION
Following script is a combination of RSI and Higher High and Lower Low script. The issue is that the HH LL labels are aligned for the price not on the RSI Line. How to align the labels to the RSI line? It is basically showing the Higher Highs and Lower Lows of RSI. The labels need to stick on to the respective RSI line.
...ANSWER
Answered 2021-Jun-15 at 09:25Changed the location.belowbar
and location.abovebar
with location.absolute
and the plotshapes display (ex: if _hl is true, plot at the RSI level, otherwise pass)
QUESTION
I am trying to contribute to a Github Page/Jekyll site and want to be able to visualise changes locally but when I run bundle exec jekyll serve
but I get this output:
ANSWER
Answered 2021-Feb-02 at 16:29I had the same problem and I found a workaround here at https://github.com/jekyll/jekyll/issues/8523
Add gem "webrick"
to the Gemfile in your website. Than run bundle install
At this point you can run bundle exec jekyll serve
For me it works!
QUESTION
I want to encrypt files fore secure storage, but the problem is, I don't know how to store the key to decrypt the files afterwards.
Code:
...ANSWER
Answered 2021-Jan-03 at 15:18The way you're encrypting data makes no sense. Asymmetric encryption can only encrypt a small, fixed amount of data. Never use asymmetric encryption such as RSA-OAEP for anything other than a symmetric key, and use that symmetric key to encrypt the actual data. For the symmetric encryption, use a proper AEAD mode such as AES-GCM or ChaCha20-Poly1305. This is called hybrid encryption.
Other things that are wrong with your code:
- A 1024-bit RSA key is not enough for security: 2048-bit is a minimum, and you should prepare to move away from RSA because its key sizes don't scale well. (Feel free to use 1024-bit keys for testing and learning, just don't use anything less than 2048-bit for RSA in production.)
- The encryption is a binary format, but you join up lines as if they were text. Text or binary: pick one. Preferably use a well-known format such as ASN.1 (complex but well-supported) for binary data or JSON for text. If you need to encode binary data in a text format, use Base64.
If this is for real-world use, scrap this and use NaCl or libsodium. In Python, use a Python wrapper such as libnacl, PyNaCl, pysodium or csodium. Use a public-key box. The Python APIs are slightly different for each Python wrapper, but all include a way to export the keys.
If this is a learning exercise, read up on hybrid encryption. Look inside libsodium to see how to do it correctly. Key import and export is done with the methods import_key
and export_key
. Symmetric encryption starts with Crypto.Cipher.AES.new(key, Crypto.Cipher.AES.MODE_GCM)
or Crypto.Cipher.ChaCha20_Poly1305.new(key)
(Crypto.Cipher.AES.new(key, Crypto.Cipher.AES.MODE_GCM, nonce=nonce)
or Crypto.Cipher.ChaCha20_Poly1305.new(key, nonce=nonce)
for decryption).
QUESTION
I have problem with my bpf program. I getting error while loading this program. my bpf program is:
...ANSWER
Answered 2021-Jun-15 at 07:28TL;DR. You should check that the pointer returned by bpf_map_lookup_elem
is not NULL.
With the following logs, the BPF verifier is telling you that, when it reaches the dereference of my_pid
, the pointer may still have a NULL value. It thus contains a map value or a NULL value, i.e., map_value_or_null
.
QUESTION
if(CanUp){
if(Input.GetKey(KeyCode.W)){
rb.MovePosition(rb.position + Vector2.up * speed * Time.fixedDeltaTime);
if(Input.GetKeyDown(KeyCode.D)){
CanUp = false;
CanRight = true;
}
}else{
CanRight = true;
}
}
if(CanRight){
if(Input.GetKey(KeyCode.D)){
rb.MovePosition(rb.position + Vector2.right * speed * Time.fixedDeltaTime);
if(Input.GetKeyDown(KeyCode.W)){
CanUp = true;
CanRight = false;
}
}else{
CanUp = true;
}
}
...ANSWER
Answered 2021-Jun-10 at 10:41Generally, you want to reduce cyclomatic complexity to make debugging and figuring out logic easier. Cyclomatic complexity can usually be identified by having a number of if
statements nested inside each other. Try:
QUESTION
TL;DR: Interested in knowing if it's possible to use Abstract Base Classes as a mixin in the way I'd like to, or if my approach is fundamentally misguided.
I have a Flask project I've been working on. As part of my project, I've implemented a "RememberingDict" class. It's a simple subclass of dict, with a handful of extra features tacked on: it remembers its creation time, it knows how to pickle/save itself to a disk, and it knows how to open/unpickle itself from a disk:
...ANSWER
Answered 2021-Jun-15 at 03:43You can get around the problems of subclassing dict
by subclassing collections.UserDict
instead. As the docs say:
Class that simulates a dictionary. The instance’s contents are kept in a regular dictionary, which is accessible via the data attribute of UserDict instances. If initialdata is provided, data is initialized with its contents; note that a reference to initialdata will not be kept, allowing it be used for other purposes.
Essentially, it's a thin regular-class wrapper around a dict
. You should be able to use it with multiple inheritance as an abstract base class, as you do with AbstractRememberingDict
.
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