tech | API REST com Django , foi proposto
kandi X-RAY | tech Summary
kandi X-RAY | tech Summary
Monte seu Computador onde seus clientes podem montar um computador pessoal (desktop) sob demanda escolhendo as peças disponíveis que irão compor o computador e a loja irá se responsabilizar pela montagem, certificação (realização de testes) e envio ao cliente. O cliente entra no site e pode selecionar as seguintes peças para montar o seu computador:. Placa de vídeo.
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Top functions reviewed by kandi - BETA
- Raises ValidationError .
- Main entry point .
- Populate the model .
- Populate the processors .
- Return the total amount of memory allocated to the network .
- Populate eggs .
- Populate videocards .
- String representation .
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Trending Discussions on tech
QUESTION
As there are many techs to achieve SM in Flutter....
Which will be best as a intermediate while developing a real world app??
...ANSWER
Answered 2021-Jun-14 at 09:38It's depend upon you and your requirements. You have to maintain the state based in your scenario. All the package you mentioned, used different different approached for state management.
QUESTION
Problem
I have a large JSON file (~700.000 lines, 1.2GB filesize) containing twitter data that I need to preprocess for data and network analysis. During the data collection an error happend: Instead of using " as a seperator ' was used. As this does not conform with the JSON standard, the file can not be processed by R or Python.
Information about the dataset: Every about 500 lines start with meta info + meta information for the users, etc. then there are the tweets in json (order of fields not stable) starting with a space, one tweet per line.
This is what I tried so far:
- A simple
data.replace('\'', '\"')
is not possible, as the "text" fields contain tweets which may contain ' or " themselves. - Using regex, I was able to catch some of the instances, but it does not catch everything:
re.compile(r'"[^"]*"(*SKIP)(*FAIL)|\'')
- Using
literal.eval(data)
from theast
package also throws an error.
As the order of the fields and the legth for each field is not stable I am stuck on how to reformat that file in order to conform to JSON.
Normal sample line of the data (for this options one and two would work, but note that the tweets are also in non-english languages, which use " or ' in their tweets):
...ANSWER
Answered 2021-Jun-07 at 13:57if the '
that are causing the problem are only in the tweets and desciption
you could try that
QUESTION
I am using a 3.5: TFT LCD display with an Arduino Uno and the library from the manufacturer, the KeDei TFT library. The library came with a bitmap font table that is huge for the small amount of memory of an Arduino Uno so I've been looking for alternatives.
What I am running into is that there doesn't seem to be a standard representation and some of the bitmap font tables I've found work fine and others display as strange doodles and marks or they display upside down or they display with letters flipped. After writing a simple application to display some of the characters, I finally realized that different bitmaps use different character orientations.
My questionWhat are the rules or standards or expected representations for the bit data for bitmap fonts? Why do there seem to be several different text character orientations used with bitmap fonts?
Thoughts about the questionAre these due to different target devices such as a Windows display driver or a Linux display driver versus a bare metal Arduino TFT LCD display driver?
What is the criteria used to determine a particular bitmap font representation as a series of unsigned char values? Are different types of raster devices such as a TFT LCD display and its controller have a different sequence of bits when drawing on the display surface by setting pixel colors?
What other possible bitmap font representations requiring a transformation which my version of the library currently doesn't offer, are there?
Is there some method other than the approach I'm using to determine what transformation is needed? I currently plug the bitmap font table into a test program and print out a set of characters to see how it looks and then fine tune the transformation by testing with the Arduino and the TFT LCD screen.
My experience thus farThe KeDei TFT library came with an a bitmap font table that was defined as
...ANSWER
Answered 2021-Jun-12 at 16:19Raster or bitmap fonts are represented in a number of different ways and there are bitmap font file standards that have been developed for both Linux and Windows. However raw data representation of bitmap fonts in programming language source code seems to vary depending on:
- the memory architecture of the target computer,
- the architecture and communication pathways to the display controller,
- character glyph height and width in pixels and
- the amount of memory for bitmap storage and what measures are taken to make that as small as possible.
A brief overview of bitmap fonts
A generic bitmap is a block of data in which individual bits are used to indicate a state of either on or off. One use of a bitmap is to store image data. Character glyphs can be created and stored as a collection of images, one for each character in the character set, so using a bitmap to encode and store each character image is a natural fit.
Bitmap fonts are bitmaps used to indicate how to display or print characters by turning on or off pixels or printing or not printing dots on a page. See Wikipedia Bitmap fonts
A bitmap font is one that stores each glyph as an array of pixels (that is, a bitmap). It is less commonly known as a raster font or a pixel font. Bitmap fonts are simply collections of raster images of glyphs. For each variant of the font, there is a complete set of glyph images, with each set containing an image for each character. For example, if a font has three sizes, and any combination of bold and italic, then there must be 12 complete sets of images.
A brief history of using bitmap fonts
The earliest user interface terminals such as teletype terminals used dot matrix printer mechanisms to print on rolls of paper. With the development of Cathode Ray Tube terminals bitmap fonts were readily transferable to that technology as dots of luminescence turned on and off by a scanning electron gun.
Earliest bitmap fonts were of a fixed height and width with the bitmap acting as a kind of stamp or pattern to print characters on the output medium, paper or display tube, with a fixed line height and a fixed line width such as the 80 columns and 24 lines of the DEC VT-100 terminal.
With increasing processing power, a more sophisticated typographical approach became available with vector fonts used to improve displayed text quality and provide improved scaling while also reducing memory required to describe the character glyphs.
In addition, while a matrix of dots or pixels worked fairly well for languages such as English, written languages with complex glyph forms were poorly served by bitmap fonts.
Representation of bitmap fonts in source code
There are a number of bitmap font file formats which provide a way to represent a bitmap font in a device independent description. For an example see Wikipedia topic - Glyph Bitmap Distribution Format
The Glyph Bitmap Distribution Format (BDF) by Adobe is a file format for storing bitmap fonts. The content takes the form of a text file intended to be human- and computer-readable. BDF is typically used in Unix X Window environments. It has largely been replaced by the PCF font format which is somewhat more efficient, and by scalable fonts such as OpenType and TrueType fonts.
Other bitmap standards such as XBM, Wikipedia topic - X BitMap, or XPM, Wikipedia topic - X PixMap, are source code components that describe bitmaps however many of these are not meant for bitmap fonts specifically but rather other graphical images such as icons, cursors, etc.
As bitmap fonts are an older format many times bitmap fonts are wrapped within another font standard such as TrueType in order to be compatible with the standard font subsystems of modern operating systems such as Linux and Windows.
However embedded systems that are running on the bare metal or using an RTOS will normally need the raw bitmap character image data in the form similar to the XBM format. See Encyclopedia of Graphics File Formats which has this example:
Following is an example of a 16x16 bitmap stored using both its X10 and X11 variations. Note that each array contains exactly the same data, but is stored using different data word types:
QUESTION
I'm currently starting to work with clickhouse for our in-house analytics system, but it looks like there are no automated ways to configure policies for data retention. The only thing I saw was the ALTER ... MOVE PARTITION
(https://clickhouse.tech/docs/en/sql-reference/statements/alter/partition/#alter_move-partition), but it looks like the process has to be manual / implemented in our application layer.
My objective is to move data older than 3 months directly to an S3 cluster for archival and price reasons, while still being able to query it.
Is there any native way to do so directly in clickhouse with storage policies?
Thanks in advance.
...ANSWER
Answered 2021-Jun-12 at 15:18This answer was based out of @Denny Crane's comment: https://altinity.com/blog/clickhouse-and-s3-compatible-object-storage, where I did put comments where there were not enough explanations, and keeping it in the event that the link dies.
-
- Add your S3 disk to a new configuration file (Let's say
/etc/clickhouse-server/config.d/storage.xml
:
- Add your S3 disk to a new configuration file (Let's say
QUESTION
Experts, i need to write XSLT 1.0 code to eliminate the double quotes at starting and ending of the field ( in short, starting and ending position double quote only), not supposed to remove any other double quote in the input field.
Input:
...ANSWER
Answered 2021-Jun-11 at 07:26QUESTION
I've got two configuration files (with usernames and passwords for the database for the testing phase) in src\main\resources\{config.properties,config.default.properties}
During the development and my own testing I would like use src\main\resources\config.properties
. On packaging the project, I'd like to include src\main\resources\config.default.properties
as config.properties
in the single jar with dependencies. How can I tell this directly in the single pom.xml
? I tried to exclude src\main\resources\config.properties
with this section, but even that didn't work:
ANSWER
Answered 2021-Jun-11 at 01:44You can define profile for environments
QUESTION
I just noticed absence of _mm256_insert_pd()
/_mm256_insert_ps()
/_mm_insert_pd()
, also _mm_insert_ps() exists but with some weird usage pattern.
While _mm_insert_epi32() and _mm256_insert_epi32() and other integer variants exist.
Is it some intentional idea of Intel not to implement float/double variants for some reason? And what is the correct and most-performant way to set single float/double at given position (not only 0th) of SSE/AVX registers?
I implemented following AVX-double variant of insert
, which works, but still maybe there is a better way to do this:
ANSWER
Answered 2021-Jun-10 at 08:55A scalar float/double is just the bottom element of an XMM/YMM register already, and there are various FP shuffle instructions including vinsertps
and vmovlhps
that can (in asm) do the insertion of a 32-bit or 64-bit element. There aren't versions of those which work on 256-bit YMM registers, though, and general 2-register shuffles aren't available until AVX-512, and only with a vector control.
Still much of the difficulty is in the intrinsics API, making it harder to get at the useful asm operations.
One not-bad way is to broadcast a scalar float or double and blend, partly because a broadcast is one of the ways that intrinsics already provide for getting a __m256d
that contains your scalar1.
Immediate-blend instructions can efficiently replace one element of another vector, even in the high half2. They have good throughput and latency, and back-end port distribution, on most AVX CPUs. They require SSE4.1, but with AVX they're always available.
(See also Agner Fog's VectorClass Library (VCL) for C++ templates for replacing an element of a vector; with various SSE / AVX feature levels. Including with runtime-variable index, but often designed to optimize down to something good for compile-time constants, e.g. a switch on the index like in Vec4f::insert()
)
float
into __m256
QUESTION
So I have 3 modules
- module
:commons:ui
which containsBaseFragment
- module
:features:home
which containsHomeFragment
, implements:commons:ui
- module
:app
which containsMainActivity
, implements:features:home
now if I try to run MainActivity
using the following code in onCreate
ANSWER
Answered 2021-Jan-26 at 01:59I got the same error many many times in a day. I don't know the cause or how to resolve it, but every time I try to run the app for the second time, it works.
QUESTION
Some context: I have a PowerShell script that gets information about users and their licenses on Azure, and then saves that information to CSV file. It works locally. My goal is to have this script automatically run on Azure (I'm trying to do it in an Azure Function App) once a month, and then have the created CSV file be emailed to a specified email. However all I want to figure out right now is how to get the list of users so that the script can at least just run without errors.
I have very little experience with PowerShell and Azure Function Apps, so I'm stuck on a few errors I'm getting. I have spent the last few days troubleshooting to no luck.
Here is the beginning of the script that I can run from my local PowerShell:
...ANSWER
Answered 2021-Jun-08 at 21:11Actually, AzureAD needs to be imported a bit differently - it's been a problem for a while per this github issue. This seemed to work for most people:
- Setting the application to run as x64 bit: Function App> Configuration > General Settings > Platform > 64 Bit
- Setting the app to run on Powershell 7 instead of 6 on this thread
- Use:
Import-Module AzureAD -UseWindowsPowerShell
QUESTION
Tech
SQL Server 2014 on a shared server with collation
Turkish_CI_AS
- cannot be changed.Entity Framework Core 5.0.5
Data in the database:
...ANSWER
Answered 2021-Jun-08 at 09:18The problem is caused by the fact that the comparison is done on the server using the server-side collation, and you can't change that through EF's linq provider (which is why the overload with the StringComparison
argument fails). The collation is case-insensitive, but of course, being Turkish, considers 'i'
and 'I
' to be different characters.
The solution is to stop trying to change the case of the product names in the database and instead modify the search criterion.
Since none of the data being searched contains 'İ'
, the modification is simple: call ToUpper()
on the search value, and make certain that the conversion isn't done with Turkish culture. For example, if the default culture on the client isn't Turkish, you can just use
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