SAS admins need to know about these menu options that may not be available in SAS Visual Analytics Viewer.

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Recently I interviewed Stefan Judis for my upcoming book. We discussed CSS custom properties, and something interesting happened.

We had a period of a few minutes where we were talking past one another, because, as it turns out, we have completely opposite ideas about the use of CSS custom properties. I had never considered his approach, and I found it interesting enough to write this quick post.

Option 1

Take several site components, each with their own link and hover/focus colours. We want to use custom properties for those colours. Exactly how do we do that?

Before my discussion with Stefan that wasn’t even a question for me. I would do this:

.component1 {
	--linkcolor: red;
	--hovercolor: blue;
}

.component2 {
	--linkcolor: purple;
	--hovercolor: cyan;
}

a {
	color: var(--linkcolor);
}

a:hover,a:focus {
	color: var(--hovercolor)
}

I set the normal and hover/focus colour as a custom property, and leave the definition of those properties to the component the link appears in. The first and second component each define different colours, which are deployed in the correct syntax. Everything works and all’s well with the world.

As far as I can see now this is the default way of using CSS custom properties. I wasn’t even aware that another possibility existed.

Option 2

Stefan surprised me by doing almost the complete opposite. He uses only a single variable and changes its value where necessary:

.component1 {
	--componentcolor: red;
}

.component1 :is(a:hover,a:focus) {
	--componentcolor: blue;
}
	
.component2 {
	--componentcolor: purple;
}

.component2 :is(a:hover,a:focus) {
	--componentcolor: cyan;
}
	
a {
	color: var(--componentcolor)		
}

At first I was confused. Why would you do this? What’s the added value of the custom property? Couldn’t you just have entered the colour values in the component styles without using custom properties at all?

Well, yes, you could. But that’s not Stefan’s point.

The point

In practice, component definitions have way more styles than just colours. There’s a bunch of box-model properties, maybe a display, and possibly text styling instructions. In any case, a lot of lines of CSS.

If you use custom properties only for those CSS properties that will change you give future CSS developers a much better and quicker insight in how your component works. If the definition uses a custom property that means the property may change in some circumstances. If it uses a fixed definition you know it’s a constant.

Suppose you encounter this component definition in a codebase you just inherited:

.component {
	--color: red;
	--background: blue
	--layout: flex;
	--padding: 1em;
	--borderWidth: 0.3em;
	display: var(--layout);
	color: var(--color);
	background: var(--background);
	padding: var(--padding);
	border: var(--borderWidth) solid black;
	margin: 10px;
	border-radius: 2em;
	grid-template-columns: repeat(3,1fr);
	flex-wrap: wrap;
}

Now you essentially found a definition file. Not only do you see the component’s default styles, you also see what might change and what will not. For instance, because the margin and border-radius are hard-coded you know they are never changed. In the case of the border, only the width changes, not the style or the colour. Most other properties can change.

The use of display: var(--layout) is particularly revealing. Apparently something somewhere changes the component’s layout from grid to flexbox. Also, if it’s a grid it has three equal columns, while if it’s a flexbox it allows wrapping. This suggests that the flexbox layout is used on narrower screens, switching to a grid layout on wider screens.

Where does the flexbox change to a grid? As a newbie to this codebase you don’t know, but you can simply search for --layout: grid and you’ll find it, probably neatly tucked away in a media query somewhere. Maybe there is a basic layout as well, which uses neither flexbox nor grid? Search for --layout: block and you’ll know.

Thus, this way of using custom properties is excellently suited for making readable code bases that you can turn over to other CSS developers. They immediately know what changes and what doesn’t.

Teaching aid?

There’s another potential benefit as well: this way of using custom properties, which are essentially variables, aligns much more with JavaScript’s use of variables. You set an important variable at the start of your code, and change it later on if necessary. This is what you do in JavaScript all the time.

Picking an option

Which option should you pick? That’s partly a matter of personal preference. Since the second option is still fairly new to me, and I rarely work on large projects, I am still feeling my way around it. Right at this moment I prefer the first way because I’m used to it. But that might change, given some extra time.

Still, I think Stefan is on to something. I think that his option is very useful in large codebases that can be inherited by other developers. I think it deserves careful consideration.

Energy consumed in heating water may not appear like a major problem, compared to industries, but thousands of homes each with 2 or 3 heaters may surpass many industries in energy consumption.

The field of stem cell research offers lucrative career options for people looking for something different in the field of medical science.

Market participants generally welcome ‘options’ trading on commodity derivatives but want to know the nitty-gritty

First understand the Greek and Latin of these derivative products and implement smart strategies to be in-the-money, say seasoned players

The IPO is likely to be in the range of $300-350 million, sources say

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Source: www.washingtontimes.com - Saturday, May 09, 2020
BEIJING (AP) - Yao Ming, the former Houston Rockets star and now president of the Chinese Basketball Association, says the league has three options for resuming the season that has been on hold since Feb. 1 over the coronavirus pandemic. Yao said the league might play out the full schedule; ...

Yield-cos have been grabbing headlines lately. Typically, large utilities spin off their high-yield alternative energy operations into separate smaller companies called yield-cos. These new companies are then taken public to attract individual and institutional investors.

ISLAMABAD: The FBR is mulling over different options to fetch additional Rs600 billion through effective enforcement and administrative improvements as well as moving ahead with one-time tax on sectors earning abnormal profits at difficult times, it is learnt.The FBR’s task for generating...

ISLAMABAD: The FBR is mulling over different options to fetch additional Rs600 billion through effective enforcement and administrative improvements as well as moving ahead with one-time tax on sectors earning abnormal profits at difficult times, it is learnt.The FBR’s task for generating...

ISLAMABAD: The FBR is mulling over different options to fetch additional Rs600 billion through effective enforcement and administrative improvements as well as moving ahead with one-time tax on sectors earning abnormal profits at difficult times, it is learnt.The FBR’s task for generating...

The two cases defrauded over 59,700 customers out of over $61 million

SAS admins need to know about these menu options that may not be available in SAS Visual Analytics Viewer.

It is exploring setting up a vehicle to take over the debt of Malaysia Airlines and AirAsia.

The post Malaysia explores debt options, M&A to bail out airlines appeared first on DealStreetAsia.

All category MSEDCL consumers including the residential and CHS (Co-operative Housing society) consumers having bill amount 10,000 & above can now avail the facility of RTGS and NEFT along with the online bill payment options.

The MSEDCL consumers primarily pay their electricity bills through cheque even if the online facility is available. However, due to the corona virus pandemic, the lockdown has affected the banking transactions. Considering this situation, MSEDCL has given the option of RTGS and NEFT for consumers having a bill of 10,000 and above. Even the single and three phase residential consumers having a bill of 10,000 and above, can make payment through this system. Along with this, the consumers can make online payment through credit card, net banking, debit card, google pay, cash card, UPI, digital wallet etc.

MSEDCL is printing the bank details on the electricity bills of residential and CHS consumers whose bill is more than 10,000. These consumers can avail this facility by using the virtual account details of MSEDCL given on their bill in their RTGS and NEFT application they submit to their bank. Also, the consumer can make payment only in the account number given on their electricity bill.

Direct Link through SMS
To make payment remotely from their home, MSEDCL sends direct payment link via SMS to LT consumers. A direct payment link is being sent via SMS including the details of bill amount, due date, etc to the consumers who have registered their mobile number with MSEDCL. The consumer can make payment using this link. The consumers who have not yet registered their mobile number with MSEDCL can send a SMS through that number typing MREG (space) (12-digit consumer number) to 9930399303. Apart from this, the consumer can also register by logging on to MSEDCL website i.e. www.mahadiscom.in or MSEDCL's Mahavitaran Mobile app.

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Rapid population growth, ageing infrastructure and new weather risks are straining the ability of cities in OECD countries to provide clean water and to protect against floods and droughts, according to a new OECD report. Cities will need large-scale investment and more effective tariffs and taxes to pay for upgrades to water systems.