DDD | Driven Design is a software development approach | Architecture library
kandi X-RAY | DDD Summary
kandi X-RAY | DDD Summary
Domain-Driven Design is a software development approach in which it utilizes concepts and good practices related to object-oriented programming.
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QUESTION
I want to select the same element with exact n occurrences.
Match letters that repeats exact 3 times in this String: "aaaaabbbcccccccccdddee"
this should return "bbb" and "ddd"
If I define what I should match like "b{3}" or "d{3}", this would be easier, but I want to match all elements
I've tried and the closest I came up is this regex: (.)\1{2}(?!\1) Which returns "aaa", "bbb", "ccc", "ddd"
And I can't add negative lookbehind, because of "non-fixed width" (?
...ANSWER
Answered 2022-Mar-29 at 06:03One possibility is to use a regex that looks for a character which is not followed by itself (or beginning of line), followed by three identical characters, followed by another character which is not the same as the second three i.e.
QUESTION
df1:
Variables left right
0 AUM -0.001 28.20
1 AUM 28.20 40.28
2 AUM 40.28 58.27
3 AUM 58.27 80.72
4 AUM 80.72 100.00
0 ABS -88.01 200.72
1 ABS 200.72 480.72
2 ABS 480.72 800.20
0 LS 10000 200000
1 LS 200000 400000
...ANSWER
Answered 2022-Mar-22 at 09:04You can use pd.cut
and avoid loops inside the binning
function:
QUESTION
I was working on making this TOS page but ran into a problem with the fade-in/fade-out animations.
I got the div to fade in when the button is clicked but don't know how to let it fade-out when the button is clicked again. Any tips would be helpful
...ANSWER
Answered 2022-Mar-18 at 19:49made the code for the toggle you probably don't need that. The main part is the fade-out animation:
QUESTION
I'm confused how this works could someone walk me through what exactly happened?
...ANSWER
Answered 2022-Mar-05 at 06:14Preface:
- The
top
,right
,bottom
, andleft
properties are collectively referred to as "box inset" properties. - Keep in mind that all CSS properties that aren't explicitly set will have default values that are either "
initial
" values or inherited values.- So unless explicitly specified otherwise, every element has
position: static;
. - The
initial
value for all of the box-inset properties isauto
, regardless of their element'sposition
anddisplay
property.- But the behaviour of the
auto
value does depend on the element'sposition
and/or formatting context.
- But the behaviour of the
- So unless explicitly specified otherwise, every element has
- CSS has a lot of surprising and counter-intuitive behaviour.
- This is not intentional, but a consequence of how CSS evolved over time over the past ~25 years it's existed.
- Originally CSS wasn't capable of any layout control at all, it was only useful for things like font and text styling.
- In fact, CSS's main layout features (like
flex
,grid
, etc) weren't added (let alone supported by browsers) until well into the 2010s.
- This is not intentional, but a consequence of how CSS evolved over time over the past ~25 years it's existed.
fills the width of the page:
has
display: flex;
, which makes it a flex-parent.All immediate child elements (with certain exceptions) of a flex-parent, that have
position: static
, are flex-items.Therefore
is a flex-item.Therefore
is not a flex-item because it has
position: absolute;
.- (Generally speaking) elements with
position: absolute;
are not subject to their layout-container's layout rules and are re-positioned with absolute-coordinates where the origin is in their-closet-ancestor-element-without-position: static;
(yes, that's a mouthful).- This is why
position: relative;
is being applied to.
- This is why
- (Generally speaking) elements with
- Therefore
is a flex-parent with only one flex-item, despite having two element children.
- And because it has
justify-content: center;
it means that its single flex-item () will be centered.
- And because it has
- Also, because
has
display: flex;
(rather thandisplay: inline-flex
) it means thatis a block-level element, so it fills the width of its container, which is
, which fills the width of the viewport.
- And because
also has
width: 100%;
(which becomesflex-basis: 100%;
) it means thewill fill the width of
.
- Therefore
,
, and
(in that order) will fill the width of the viewport.
- And because
is centered:
- As
uses
auto
for all its box inset properties (i.e.top
,right
, etc) withposition: absolute;
then the computed value of those properties is the same as ifwas
position: static;
.- However, if
- which would mean it would be located somewhere off to the right of the line (due towas
position: static;
then it would be a flex-item and would share its flex row withjustify-content: center;
).But it's actually centered, because this is a special-case scenario that's specifically specified in the specification...
https://www.w3.org/TR/css-flexbox-1/#abspos-items
4.1. Absolutely-Positioned Flex ChildrenAs it is out-of-flow, an absolutely-positioned child of a flex container does not participate in flex layout.
The
static
position of anabsolute
ly-positioned child of aflex
container is determined such that the child is positioned as if it were the sole flex item in the flex container, assuming both the child and the flex container were fixed-size boxes of their used size. For this purpose, auto margins are treated as zero.
- However, if
It's well-worth reading the rest of the section as it also covers other brain-stretching scenarios, like "what if align-self: center;
is used"?
QUESTION
I'm trying to build a doughnut chart with rounded edges only on one side. My problem is that I have both sided rounded and not just on the one side. Also can't figure out how to do more foreground arcs not just one.
...ANSWER
Answered 2022-Feb-28 at 08:52The documentation states, that the corner radius is applied to both ends of the arc. Additionally, you want the arcs to overlap, which is also not the case.
You can add the one-sided rounded corners the following way:
- Use arcs
arc
with no corner radius for the data. - Add additional
path
objectscorner
just for the rounded corner. These need to be shifted to the end of eacharc
. - Since
corner
has rounded corners on both sides, add aclipPath
that clips half of this arc. TheclipPath
contains apath
for everycorner
. This is essential for arcs smaller than two times the length of the rounded corners. raise
all elements ofcorner
to the front and thensort
them descending by index, so that they overlap the right way.
QUESTION
A | B |
----------------------|---------------|--------------------------
1 2022-02-14 | Mo | B1 = TEXT(A1,"DDD")
2 | |
3 | |
...ANSWER
Answered 2022-Feb-19 at 09:26The solution from JvdV in the comments solves the problem:
QUESTION
I've been digging into DDD for the first time the last few weeks. I'm developing an HR application and am really struggling with the idea of Aggregate Roots.
So the current entities would be:
- Company
- Employee
Now given the lifecycle of an Employee, it makes sense at first to include it as a child entity on Company. An Employee can be added to a Company (new hire or existing) and then that Employee could resign or be fired - at which point that Employee record would likely be updated with some kind of status, so it can be differentiated from active Employees.
In regards to domain logic, every Employee at a Company must have a unique email. So if a Company always contained a list of all its Employees, I imagined that could be modeled as:
company.AddEmployee(employee)
- This method would contain logic that makes sure the email is unique. In addition, it would update the size property of the Company, based on how many Employees they have. (<100 is small, <500 is medium, etc)
Now the biggest issue I have seen people discuss is concerning large Aggregates. I think this use case would fall under that concern, as a Company could have 10k+ Employees in this HR application. If I'm adding a single Employee at a time, it seems really wasteful to gather all 10k+, even if it's just their emails.
Am I doing the right thing here by making the Company the Aggregate Root, or is there a better way?
...ANSWER
Answered 2022-Feb-09 at 23:08You can keep Company as the aggregate root, but I'd use domain events to guard against duplicate emails.
My approach would be along the following lines:
QUESTION
I'm exploring a new DDD project using SQLAlchemy and Alembic for the first time. I'd like to use imperative mapping to isolate my domain objects. All the doc I can find about auto generating migrations with Alembic is using declarative mapping. Is it because I have to manually write all migrations if I want to use imperative mapping ?
...ANSWER
Answered 2022-Feb-02 at 18:03I had to import the metada of the Table
I manually defined
QUESTION
I have the following Pandas Dataframe:
...ANSWER
Answered 2022-Jan-30 at 16:59Something like this?
QUESTION
I have been working on Material-UI and trying to use a color system throughout the palette. There seems to be some issue while compilation although it works perfectly in run time. Can someone help me resolve following error:
Error:
Property 'main' does not exist on type 'PaletteColorOptions'.
Property 'main' does not exist on type 'Partial'.(2339)
Here is stackblitz as well: https://stackblitz.com/edit/react-up6bjl-hx1bbh?file=demo.tsx
Code:
...ANSWER
Answered 2022-Jan-18 at 02:50The TypeScript error is unrelated to your module augmentation. The issue is just that defaultColors
is of type PaletteOptions
. PaletteOptions
defines primary to be of type PaletteColorOptions.
Here's the definition of PaletteColorOptions and the types it is built from:
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