Le1 | A universal input USB power supply | Change Data Capture library

by localelectricity C++ Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | Le1 Summary

Le1 is a C++ library typically used in Utilities, Change Data Capture applications. Le1 has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

A universal input USB power supply.

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Support

Le1 has a low active ecosystem.

It has 5 star(s) with 1 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

Le1 has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of Le1 is current.

Quality

Le1 has no bugs reported.

Security

Le1 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

Le1 does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

Le1 releases are not available. You will need to build from source code and install.

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Le1 Key Features

No Key Features are available at this moment for Le1.

Le1 Examples and Code Snippets

No Code Snippets are available at this moment for Le1.

Community Discussions

Trending Discussions on Le1

My grammar identifiers keywords as identifiers

How I could use tail call optimisation on this combination function?

PySide2: How to re-implement QFormLayout.takeRow()?

Parsing CSV with regex

How do you scrape a table when the table is unable to return values? (BeautifulSoup)

Initiating a custom QWidget within another QWidget class' function

Focus Highlighting issue with Combo box and Radio Button with Enter Key pressed event

Scrapy LinkExtractor crawling links that use parent directory

Bash: Copy all files with same extension in root/current folder, except those whose filename contains certain string

Assembling jasmin class leads to inverted operators and comparisons

QUESTION

My grammar identifiers keywords as identifiers

Asked 2021-Apr-07 at 12:15

I'm trying to parse expressions from the Jakarta Expression Language. In summary, it is a simplified Java expressions, with addition of a few things:

Support for creating maps like: {"foo": "bar"}
Support for creating lists and sets like: [1,2,3,4] {1,2,3,4}
Use some identifiers instead of symbols, like: foo gt bar (foo > bar), foo mod bar(foo % bar), and so on.

I'm struggling in the last bit, where it always understands the "mod", "gt", "ge" as identifiers instead of using the expression that has the "%", ">", ">=".

I'm new to ANTLR. My grammar is based on the Java grammar in the https://github.com/antlr/grammars-v4/tree/master/java/java and the JavaCC provided by: https://jakarta.ee/specifications/expression-language/4.0/jakarta-expression-language-spec-4.0.html#collected-syntax

...

ANSWER

Answered 2021-Apr-07 at 12:15

Move the Lexer rules for them to be prior to the Lexer rule for Identifier.

If ANTLR has more than one Lexer rule that matches input of the same length it chooses the first rule in the grammar that matches.

For example “mod” is matched by Identifier and MOD1, but Identifier is 1st, so it chooses Identifier. Move the MOD1 rule to be before Identifier and it’ll match MOD1

———-

BTW, unless you care about having different token values for “%” and “mod”, you can just define a single rule:

Source https://stackoverflow.com/questions/66985353

QUESTION

How I could use tail call optimisation on this combination function?

Asked 2021-Apr-06 at 21:13

My exercise, that you can see here, says that I need to implement a recursive version of C(n, k).

That's my solution:

...

ANSWER

Answered 2021-Apr-06 at 18:11

The traditional implementation looks like this:

Source https://stackoverflow.com/questions/66961170

QUESTION

PySide2: How to re-implement QFormLayout.takeRow()?

Asked 2021-Feb-22 at 13:34

I've noticed that QFormLayout in Pyside2 does not have the takeRow method like its PyQt5 counterpart. I've attempted to subclass QFormLayout to incorporate a similar method, but I've run into Runtime Errors, as the removal behavor of the LabelRole item is different than the FieldRole item. Another issue being that the LabelRole item does not actually get taken off the row even when the row itself is removed.

The following is the test sample I've been working with using Python 3.8.6:

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ANSWER

Answered 2021-Feb-22 at 13:34

The problem is that the label was created internally by Qt from a string, rather than by explicitly creating a QLabel in Python. This means that when the row is removed, the last remaining reference is also removed, which deletes the label on the C++ side. After that, all that's left on the Python side is an empty PyQt wrapper - so when you try to call setParent on it, a RuntimeError will be raised, because the underlying C++ part no longer exists.

Your example can therefore be fixed by getting python references to the label/field objects before the layout-item is removed:

Source https://stackoverflow.com/questions/66232460

QUESTION

Parsing CSV with regex

Asked 2020-Nov-20 at 21:49

I am trying to read below from CSV and split accordingly:

...

ANSWER

Answered 2020-Nov-17 at 18:16

You want to get the stuff between ""? And there are no other " than those used as delimiters? Then "(.*?)" should work.

Source https://stackoverflow.com/questions/64880933

QUESTION

How do you scrape a table when the table is unable to return values? (BeautifulSoup)

Asked 2020-Nov-13 at 20:43

The following is my code:

...

ANSWER

Answered 2020-Nov-13 at 20:43

This is happening because the table is within HTML comments .

You can extract the table checking if the tags are of the type Comment:

Source https://stackoverflow.com/questions/64827590

QUESTION

Initiating a custom QWidget within another QWidget class' function

Asked 2020-Sep-08 at 18:58

I'm new to python and pyqt. I am am trying to create a matrix of QToolButtons where upon pressing a button, a QDialog pops up for user input (more than one field).

I have a class for a button matrix object and a class for a dialog but can't seem to get a function within the button matrix class initiate an instance of the dialog class / widget.

Can anyone please advise me on what I'm doing wrong?

I have provided the code below:

...

ANSWER

Answered 2020-Sep-08 at 15:33

The inputdialogdemo instance is correctly created both in the __init__ and in button_released, the problem is that as soon as those function return, the ex instance gets garbage collected: since there is no persistent reference (ex is just a local variable), python automatically deletes it to avoid unnecessary memory consumption.

Since you're needing a dialog, the best solution is to inherit from QDialog instead of QWidget; this has two important benefits: it keeps the dialog modal (it stays on top of other windows and avoid interaction with them) and provides the exec_() method, which does not return until the dialog is closed; then you can add a QDialogButtonBox for standard Ok/Cancel buttons, and connect its accepted and rejected to the accept() and reject() slots of the dialog.

Source https://stackoverflow.com/questions/63796559

QUESTION

Focus Highlighting issue with Combo box and Radio Button with Enter Key pressed event

Asked 2020-Aug-25 at 18:03

I have been working on PyQt focus method for different widgets whenever Enter key pressed instead of conventional Tab key.

Furthermore, I am able to set focus to the widget which I intended upon Enter key event. However, whenever the focus is on QComboBox or QRadioButton, these two widgets don't seems to highlight like QLineEdit or QPushButton widgets.

I know that I have to set focus policy to StrongFocus and I have tried that and several other methods but unable to fix this issue. Moreover, this behaviour is working perfectly fine and combo box or radio button seems to highlight as well with the Tab key.

Please find below my tried code until now and also snapshot for the actual results.

...

ANSWER

Answered 2020-Aug-25 at 18:02

When the Tab is pressed to make the focus change then the application sets the Qt.WA_KeyboardFocusChange attribute in the window and that is used by the QStyle to make the border painting but since this is not the case then that attribute has to be set directly:

Source https://stackoverflow.com/questions/63583359

QUESTION

Scrapy LinkExtractor crawling links that use parent directory

Asked 2020-Jun-15 at 13:51

Using a basic CrawlerSpider in Scrapy, I'm trying to crawl a page. The related links in the page that I want to crawl all start with the parent directory notation .. instead of the full domain.

For example, if I'm starting with page https://www.mytarget.com/posts/4/friendly-url, and I want to crawl every post in /posts, the related links on that page will be:

...

ANSWER

Answered 2020-Jun-15 at 13:51

I solved this issue with this regex r'posts/[0-9]+/[A-Za-z-_]+'

Source https://stackoverflow.com/questions/62178548

QUESTION

Bash: Copy all files with same extension in root/current folder, except those whose filename contains certain string

Asked 2020-Jun-01 at 20:38

I have built script for copying multiple folders and files matching file types in one cp command line only like below:

...

ANSWER

Answered 2020-Jun-01 at 20:38

Using extended glob:

Source https://stackoverflow.com/questions/62140550

QUESTION

Assembling jasmin class leads to inverted operators and comparisons

Asked 2020-May-07 at 17:39

When I try assembling my test.j jasmin file with the commandline java -jar Jasmin.jar test.j it generates the test.class file without any errors. All the code is the same except for the operators and comparisons, all my + will become -, the == all become != and so on and so forth.

My test.j jasmin file adds 2 numbers and checks if these are equal to 7, if true print something, else print something else. At the end it will always print one line of text.

test.j file:

...

ANSWER

Answered 2020-May-07 at 17:39

The jasmin code you posted contains isub, which is for subtraction, not addition. The assembler is correct. You are outputting assembly that does not match your intended behavior.

Source https://stackoverflow.com/questions/61662674

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Vulnerabilities

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Install Le1

You can download it from GitHub.

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