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Can an html element have multiple ids?
I understand that an id must be unique within an HTML/XHTML page.
18 Answers
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When to use an object instance variable versus passing an argument to the method
...ou can follow whenever creating your classes.
Instance variables are typically considered to be attributes of a class. Think of these as adjectives of the object that will be created from your class. If your instance data can be used to help describe the object, then it's probably safe to bet it's...
Ruby custom error classes: inheritance of the message attribute
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Your idea is right, but the way you call it is wrong. It should be
raise MyCustomError.new(an_object, "A message")
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How can I access a JavaScript object which has spaces in the object's key?
... notation (for more details see property accessors). Objects are sometimes called associative arrays since each property is associated with a string value that can be used to access it. So, for example, you could access the properties of the myCar object as follows:
myCar['make'] = 'Ford';
myCar['m...
How to efficiently build a tree from a flat structure?
I have a bunch of objects in a flat structure. These objects have an ID and a ParentID property so they can be arranged in trees. They are in no particular order.
Each ParentID property does not necessarily matches with an ID in the structure. Therefore their could be several trees emerging ...
How to apply a CSS filter to a background image
...content.
You can also use backdrop-filter
There is a supported property called backdrop-filter, and it is currently
supported in Chrome 76, Edge, Safari, and iOS Safari (see caniuse.com for statistics).
From Mozilla devdocs:
The backdrop-filter property provides for effects like blurring or...
1052: Column 'id' in field list is ambiguous
I have 2 tables. tbl_names and tbl_section which has both the id field in them. How do I go about selecting the id field, because I always get this error:
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How do you comment out code in PowerShell?
...n PowerShell V2 <# #> can be used for block comments and more specifically for help comments.
#REQUIRES -Version 2.0
<#
.SYNOPSIS
A brief description of the function or script. This keyword can be used
only once in each topic.
.DESCRIPTION
A detailed description of the functio...
“continue” in cursor.forEach()
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Each iteration of the forEach() will call the function that you have supplied. To stop further processing within any given iteration (and continue with the next item) you just have to return from the function at the appropriate point:
elementsCollection.forEach...
How to choose an AES encryption mode (CBC ECB CTR OCB CFB)?
...e ciphertext and only decrypt it if it has not been tampered with. This is called encrypt-then-mac and should be preferred to any other order. Except for very few use cases authenticity is as important as confidentiality (the latter of which is the aim of encryption). Authenticated encryption scheme...