Permalinks – How can I edit the image URL in the presented image and product description in large quantities?

I tried a few plugins (free of charge), but none updated the URL in the product image and in the product descriptions.

How can I update in bulk instead of running them individually? If there is a plugin (preferably free) that can edit the image url, please let me know.

Thanks a lot

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The description of the dependency inversion principle could be simpler.

I have always seen DIP explained briefly with 2 bullets:

  • Abstractions should depend on abstractions

  • Details should depend on abstractions

And we wondered how it is different from saying "everything should depend on abstractions".
`
Do I miss something if my approach is to never be dependent on other class implementations during development?

Javascript – Shopping cart items show errors after adding a description field to content

I tried to find out why there is an error in my shopping cart, but apparently you cannot find it. The problem started when I added the content of the description field and a small change to my Js file.

Here is the link to the project on github http://elvin247.github.io

Here is my Js code:

// JavaScript document
const client = contentful.createClient ({
// This is the space ID. The content of a space is like a project folder
Space: "r742wojtl7kg",
// This is the access token for this area. You usually get both the ID and the token in the Contentful web application
Access token:
A8PNnqkBaRJN4TvjyNxDR0C0erFG9LgntCJ_0hL68jM
});

// variables
const cartBtn = document.querySelector (". cart-btn");
const closeCartBtn = document.querySelector (". close-cart");
const clearCartBtn = document.querySelector (". clear-cart");
const cartDOM = document.querySelector (". cart");
const cartOverlay = document.querySelector (". cart-overlay");
const cartItems = document.querySelector (". cart-items");
const cartTotal = document.querySelector (". cart-total");
const cartContent = document.querySelector (". cart-content");
const productsDOM = document.querySelector (". products-center");
let cart = ();
let buttonDOM = ();
// syntactic sugar of the writing constructor function

// Products
Class products {
async getProducts () {
// always returns a promise so we can add .then
// We can use wait until the promise is fulfilled and return the result
To attempt {
// let result = wait for fetch ("products.json");
// leave data = wait for result.json ();
let contentful = wait for client.getEntries ({
content_type: "reejuviProducts"
});
console.log (contentful.items);

  let products = contentful.items;
  products = products.map(item => {
     const { title, price, description } = item.fields;
    const { id } = item.sys;
    const image = item.fields.image.fields.file.url;
   return { title, price, description, image };
  });

  return products;
} catch (error) {
  console.log(error);
}

}}
}}

// ui
Class UI {
displayProducts (products) {
let result = "";
products.forEach (product => {
Result + =

product

$ {product.title}

$ {product.description}

& # 8358; $ {product.price}


;;
});
productsDOM.innerHTML = result;
}}
getBagButtons () {
let button = (… document.querySelectorAll (". bag-btn"));
buttonDOM = buttons;
button.forEach (button => {
let id = button.dataset.id;
let inCart = cart.find (item => item.id === id);

  if (inCart) {
    button.innerText = "In Cart";
    button.disabled = true;
  }
  button.addEventListener("click", event => {
    // disable button
    event.target.innerText = "In Cart";
    event.target.disabled = true;
    // add to cart
    let cartItem = { ...Storage.getProduct(id), amount: 1 };
    cart = (...cart, cartItem);
    Storage.saveCart(cart);
    // add to DOM
    this.setCartValues(cart);
    this.addCartItem(cartItem);

// this.showCart ();
});
});
}}
setCartValues ​​(shopping cart) {
let tempTotal = 0;
let itemsTotal = 0;
cart.map (item => {
tempTotal + = item.price * item.amount;
itemsTotal + = item.amount;
});
cartTotal.innerText = parseFloat (tempTotal.toFixed (2));
cartItems.innerText = itemsTotal;
}}

addCartItem (item) {
const div = document.createElement ("div");
div.classList.add ("shopping cart");
div.innerHTML = `

$ {item.title}
₦ $ {item.price}
remove

      
`;
cartContent.appendChild(div);

}}
showCart () {
cartOverlay.classList.add ("transparentBcg");
cartDOM.classList.add ("showCart");
}}
setupAPP () {
cart = Storage.getCart ();
this.setCartValues ​​(cart);
this.populateCart (shopping cart);
cartBtn.addEventListener ("click", this.showCart);
closeCartBtn.addEventListener ("click", this.hideCart);
}}
populateCart (shopping cart) {
cart.forEach (item => this.addCartItem (item));
}}
hideCart () {
cartOverlay.classList.remove ("transparentBcg");
cartDOM.classList.remove ("showCart");
}}
cartLogic () {
clearCartBtn.addEventListener ("click", () => {
this.clearCart ();
});
cartContent.addEventListener ("click", event => {
if (event.target.classList.contains ("remove-item")) {
let removeItem = event.target;
let id = removeItem.dataset.id;
cartContent.removeChild (removeItem.parentElement.parentElement);
// remove item
this.removeItem (id);
} else if (event.target.classList.contains ("fa-chevron-up")) {
let addAmount = event.target;
let id = addAmount.dataset.id;
let tempItem = cart.find (item => item.id === id);
tempItem.amount = tempItem.amount + 1;
Storage.saveCart (shopping cart);
this.setCartValues ​​(cart);
addAmount.nextElementSibling.innerText = tempItem.amount;
} else if (event.target.classList.contains ("fa-chevron-down")) {
let lowerAmount = event.target;
let id = lowerAmount.dataset.id;
let tempItem = cart.find (item => item.id === id);
tempItem.amount = tempItem.amount – 1;
if (tempItem.amount> 0) {
Storage.saveCart (shopping cart);
this.setCartValues ​​(cart);
lowerAmount.previousElementSibling.innerText = tempItem.amount;
} else {
cartContent.removeChild (lowerAmount.parentElement.parentElement);
this.removeItem (id);
}}
}}
});
}}
clearCart () {
// console.log (this);
let cartItems = cart.map (item => item.id);
cartItems.forEach (id => this.removeItem (id));
while (cartContent.children.length> 0) {
cartContent.removeChild (cartContent.children (0));
}}
this.hideCart ();
}}
removeItem (id) {
cart = cart.filter (item => item.id! == id);
this.setCartValues ​​(cart);
Storage.saveCart (shopping cart);
let button = this.getSingleButton (id);
button.disabled = false;
button.innerHTML = add to cart;;
}}
getSingleButton (id) {
return buttonDOM.find (button => button.dataset.id === id);
}}
}}

Class memory {
static saveProducts (products) {
localStorage.setItem ("Products", JSON.stringify (Products));
}}
static getProduct (id) {
let products = JSON.parse (localStorage.getItem ("products"));
return products.find (product => product.id === id);
}}
static saveCart (shopping cart) {
localStorage.setItem ("cart", JSON.stringify (cart));
}}
static getCart () {
return localStorage.getItem ("cart")
? JSON.parse (localStorage.getItem ("cart"))
: ();
}}
}}

document.addEventListener ("DOMContentLoaded", () => {
const ui = new user interface ();
const products = new products ();
ui.setupAPP ();

// get all products
Products
.getProducts ()
.then (products => {
ui.displayProducts (products);
Storage.saveProducts (products);
})
.then (() => {
ui.getBagButtons ();
ui.cartLogic ();
});
});

Homological algebra – dualization of the complex description in the Stacks project

The question is closely related to this question (more specifically, the reference to the AGl earner's comment) and aims to understand the proof of Lemma 20.2 from notes from stacks. Notes from stacks about the dualization complex. Lemma 20.2 states

Lemma 20.2. To let $ (A, m, kappa = A / m) $ be a noetheric local ring with normalized dualization
complex $ omega ^ { bullet} _A $
and dualization module $ omega_A: = H ^ {- dim A} omega ^ { bullet} _A $. The following is equivalent:

(1) $ A $ is Cohen-Macaulay,

(2) $ omega ^ { bullet} _A $ is concentrated in one degree, and

(3) $ omega ^ { bullet} _A = omega_A ( dim (A)) $. (i.e. a complex that is concentrated in degrees $ dim (A) $ and is zero in other degrees)

In this case $ omega $ is a maximum Cohen-Macaulay module. The evidence relates to Lemma 16.7::

Lemma 16.7.
To let $ (A, m, kappa = A / m) $ be a noetheric local ring with normalized dualization complex $ omega ^ { bullet} _A $. To let $ M $ be finally $ A $-Module. Here $ M $ is considered complex (or a class of that complex in $ D (A) $) With $ M (0) = M $ and $ M (i) = 0 $ to the $ i neq 0 $. The following are equivalent

(1) $ M $ is Cohen-Macaulay,

(2) $ Ext ^ i _A (M, omega ^ { bullet} _A) $ is non-zero for a single $ i $,

(3) $ Ext ^ {- i} _A (M, omega ^ { bullet} _A) $
is zero for $ i neq dim (Supp (M)) $.

I don't understand why 16.7 implies that $ (1) Rightarrow (3) $ in 20.2: why does that imply? $ omega ^ { bullet} _A = omega_A ( dim (A)) $? I think we are using 16.7 $ M = A $.

Then by definition for two complexes $ X ^ { Bullet}, Y ^ { Bullet} $ Ext is defined by

$$ Ext_A ^ i (X ^ { sphere}, Y ^ { sphere}): = Hom_ {D (A)} (X ^ { sphere}, Y ^ { sphere} (i)) = Hom_ { D (A)} (X ^ { Bullet} (- i), Y ^ { Bullet}) $$

Moreover $ Ext_A ^ i (X ^ { sphere}, Y ^ { sphere}) = H ^ i (RHom_ {D (A)} (X ^ { sphere}, Y ^ { sphere})) $. If $ Y ^ { Bullet} to I ^ { Bullet} $ is an injective resolution, then we can calculate it by $ Ext_A ^ i (X ^ { sphere}, Y ^ { sphere}) = Hom_ {K (A)} (X ^ { sphere}, I ^ { sphere} (i)) $ and similar with a projective resolution of $ X ^ { bullet} $.

$ A $ has the most natural projective resolution $ I ^ { bullet} _A to A $ by $ … to 0 to A xrightarrow { text {id}} A $.

so we get $ Ext ^ i _A (A, Omega ^ { sphere} _A) = Hom_ {D (A)} (A, Omega ^ { sphere} _A (i)) = Hom_ {K (A)} (I . ^ { kugel} _A, omega ^ { kugel} _A (i)) = Hom_A (A, omega ^ { kugel} _A (i) _0) = ( omega ^ { kugel} _A) _i $.

Now comes the part I don't understand:
Why $ omega ^ { bullet} _ {- d} = H ^ {- d} ( omega ^ { bullet}) =
omega_A (d) _ {- d} = omega_A $
(Recall definition of
$ omega_A $ about)?

We observed that $ Ext ^ i _A (A, omega ^ { bullet} _A) =
omega ^ { bullet} _i $
we "only" have to show that
$ Ext ^ {- d} _A (A, Omega ^ { sphere} _A) = H ^ {- d} ( Omega ^ { sphere}) $.

Why is it true

If we continue as before $ Ext ^ {- d} _A (A, omega ^ { bullet} _A)
= H ^ {- d} (Hom_ {D (A)} (A, omega ^ { bullet} _A) =
H ^ {- d} (Hom_A (A, omega ^ { bullet} _A) =
= H ^ {- d} ( omega ^ { bullet} _0) = omega ^ { bullet} _0 $
. This is nonsense.

manpage – Search the description of the commands available on Linux

I was wondering if there is a command that finds a suitable command. More specifically, I'm looking for something like that whatis Command that contains a brief summary of a command. For example, if I want to know, there is a command that has tcp Word in the output of his whatis Command.

It would be great if I could search all of them man Pages available in my system.

I will write shopify product description, SEO title and related tags for $ 5

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Public key infrastructure – Technical description of a self-signed certificate

I have a friendly debate with a colleague about the importance of "self-signed" when it comes to PKI. We have an internal master and subordinate certification body in our organization. We import the certificate chain to internal clients to ensure the trust of certificates issued by our internal / private certification body.

My colleague believes that there is no publicly trusted / commercial certification body involved in defining a self-signed certificate. However, I understand a self-signed certificate as a certificate that was created by the host it is on and that has no further connection to a private or public chain.

I searched Google and found that both answers were advertised as correct. I don't understand RFCs well, which I probably need to do to really get to the bottom of this argument. Can someone who is better informed than me help resolve this disagreement?

Thank you in advance!