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Personally, when chaining method calls, I like the LINQ convention of each method call in the chain on a separate line. So the following, from your example:
list.WhenNotEmpty()?.ForEach(s => s.Prepare(out var r)?.Manipulate(r));
Becomes:
list
.WhenNotEmpty()?
.ForEach(s => s
.Prepare(out var r)?
.Manipulate(r));
Might just be me, but I find it easier to read that way. That said, not sure I completely follow the sentence / paragraph analogy 
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I'll use that format too, or use parens like braces. Sometimes I'll put my conditionals on the next line. Sometimes it seems clearer. But not always. This tells me a lot but is really hard to read.
list
.WhenNotEmpty()
?.ForEach(
s => s.Prepare(out var r)
?.Manipulate(r)
);
I should be consistent... 
The analogy was a little loose. Maybe bullets and paragraphs would be better. Overall I kind-of missed the mark. Basically, when I'm reading code and have to scroll through many lines of code my mind goes to the details of the code and not the business flow. I like a style that favors "what it does" to "how it does it".
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Eric Lynch wrote: Might just be me,
I do it too.
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I think the difference is in debugging. If there is an error in your "Sentence" code, the debugger stops at that line and you have at least 5 points of failure on that line to check. You might end up turning it back into a paragraph before you figure it out.
With the "paragraph", the debugger stops at the specific line with the error.
I usually prefer the paragraph method, for that reason.
Brent
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dbrenth wrote: I think the difference is in debugging.
This is true. Happily the VS2017 debugger is much better (than previous versions of VS) about being able to step into (and even set breakpoints on) anonymous methods. The problem I tend to encounter with complex lambda expressions is, one misplaced , or paren or other typo and the whole expression syntax-errors with really no clue as to what the parser is actually annoyed about.
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When I look at some code, I wonder which paragraphs of the law may apply and what the author should be sentenced to.
Before someone screams at me for not being on topic enough: I don't have much of a choice right now.
SUM_Loop: SEX R2
LDN R7 ; get a byte from the ROM
STXD ; push it onto the stack
IRX
GLO R8 ; get the low byte of the current sum
ADD ; add both bytes
PLO R8 ; update R8.0
GHI R8 ; get the high byte of the current sum
ADCI 00H ; add 00H with carry
PHI R8 ; update R8.1
GHI R7 ; are we done?
SDI HI(ROMEnd)
BNZ SUM_Continue
GLO R7
SDI HI(ROMEnd)
BZ SUM_Result
I have lived with several Zen masters - all of them were cats.
His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.
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Some set of unwritten rules in my head - taking into account any possibility of expansion down the line (keep it verbose) or none (one-liners). For example:
The target of a php AJAX call will check for values:
$value = (isset($_REQUEST['value']))?$_REQUEST['value']:some_default; as there's no where to go with this.
On the other hand, an if/else block leaves easy room for expansion - unless, of course, it's amenable to a switch(). And so on.
| Ravings en masse^ |
|---|
| "The difference between genius and stupidity is that genius has its limits." - Albert Einstein | | "If you are searching for perfection in others, then you seek disappointment. If you are seek perfection in yourself, then you will find failure." - Balboos HaGadol Mar 2010 |
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I also like each chained call on a new line:
List
.WhenNotEmpty()?
.ForEach(s => s.Prepare(out var r)?
.Manipulate(r));
This code, however raises red flags when if I were to review it:
list.WhenNotEmpty()?.ForEach(s => s.Prepare(out var r)?.Manipulate(r));
Seeing an "out" var inside a ForEach, then doing something with the value smells of side-effects. I know this is a contrived example, but if I saw this, I would take some time to investigate and possibly suggest a way of encapsulating it in a method and ensure no side effects can leak out, or encapsulate the state changes in a return object so it is obvious.
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Yeah, I knew that bit would trigger a few shudders and cringes going in. Not something I would actually do, just felt a little impish when building the example...
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Sentences. I use Linq, extension methods, and fluent style, meaning methods often return this rather than a value, which can be accessed through a getter property if necessary.
And tuples! I love tuples! Again, a useful, common to other languages not just C#, that the juniors have never seen.
The result looks a lot more like F# with its continuation and partial closure syntax.
Sadly, even though the code "reads" easily enough, it boggles the mind of the junior devs.
And the really sad thing is, the junior devs don't even know about the null continuation operator, so the first question I get is, WTF is ?.
As per my previous post, there's dumbing down, and then there's just lobotomy dumb. The null continuation operator is such a nice shorthand vs. cluttering code with if-else statements. So you'll see a lot of my code that looks like GetXmlElement(Constants.MyElement)?.Value ?? Constants.MyElementDefaultValue); but again, the junior devs are totally flustered by the ?. ?? notation.
Oh well, they need to learn. This notation (or equivalent) is common enough in other languages nowadays, so LEARN, GFD!!!!
[edit]And worse, the juniors have never been mentored to NOT code literal strings, so their code is littered with literals.  And of course, when something needs changing, you have to search the entire code base for all references.
[edit]
For example, I find this totally readable:
new List<Control>()
{
tbCashDrawerOnes,
tbCashDrawerTwos,
tbCashDrawerFives,
tbCashDrawerTens,
tbCashDrawerTwenties,
tbCashDrawerFifties,
tbCashDrawerHundreds
}.ForEach(ctrl => ctrl.TextChanged += (_, __) => ignoreCashDrawerTextBoxEvents.Else(() => UpdateCashDrawer()));
But it is esoteric, I suppose.
modified 31-May-18 15:02pm.
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Technically:
list.WhenNotEmpty()?.ForEach(s => s.Prepare(out var r)?.Manipulate(r));
Would work as well as:
list.ForEach(s => s.Prepare(out var r)?.Manipulate(r));
Given that an empty list is, well, empty. But again, to rant more about junior devs vs. experienced devs, IMO (as an experienced dev) a list should never be null. It should be empty or have content. But I see so many "if null" checks because nobody initializes their collections in the constructor, for example. And since the juniors are stuck in the dark ages because they don't get training, even:
list?.ForEach(s => s.Prepare(out var r)?.Manipulate(r));
is unknown to them, though I'd still squawk at them for having a null list.
Then again, I've also seen the null continuation operator abused in ways that tell me the programmer really had no right to be writing code: Code Review - What You Can Learn From a Single Line of Code
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Richard Deeming wrote: There's one feature of C# 8 you'll like, then!
Quite so. Still, I wonder where they're going with this -- nullable value types are great, and so it makes sense that the complement, non-nullable reference types, should exist, it certainly provides symmetry.
But oh boy, there are going to be thousands of warnings in the code base I work with at work when (if ever) they opt-in for this. But it'll probably be a few years before they get their build systems onto the C# 8, which by then they still will probably be several versions behind, as they are now. 
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Interesting comment. I was returning the null to abuse the nullco and short circuit the chain, even though the (actual) list itself isn't null, just empty. But you make a good point about things that shouldn't be null. Returning a null when empty does (though only shortly until the nullco) create a null list. Not using the nullco immediately after would turn a null list loose.
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Paragraphs, then collapse all the functions I'm not actively messing around with.
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If you use VS, you can change the formatting parameters depending on who you show the code to: Before showing your code to a code homeopath, you check every single option in the New Lines and Spacing sections and uncheck the Wrapping options. Then go to the closing brace of the file, delete and retype it, and the code is ready for presentation. When you go back to the coding, you set the switches back to your preferences, delete and retype the closing brace.
If you are fond of end-of-line comments, they won't be nicely lined up at column 70 when you show your code in diluted mode. That is usually a minor problem with the homeopaths; the never look beyond column 30 of the source file anyway. Besides, the majority of them are totally unfamiliar with the very concept of end-of-line comments; they put all comments into the huge commment block over every function.
This works fine with C#; I never tried with other languages.
In the old days before we had automatic formatting, and code discussions were based on hardcopy printouts, a nice trick was to print all source code double spaced. I have had homeopaths commenting point to a few specific blank lines telling that I could drop the blank to emphasize that they really go together - never noticing that the entire file had "blank lines" between every printed line - or three or five blank lines.
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In your example:
list.WhenNotEmpty()?.ForEach(s => s.Prepare(out var r)?.Manipulate(r));
The WhenNotEmpty()?. isn't really needed, is it?
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No, not really in this case. Something like .When(predicate) that might have been better. Or following it with something where it did matter.
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I was saying that you can use an empty collection with foreach, which will basically do nothing. You shouldn't need anything there.
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Right. That's what I meant by "following it with something that did matter".
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Ah good, learnt something new first thing in the morning, now the rest for the day.
the this class extensions parameter looks interesting. Might see if can use a bit of it.
thanks
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The one problem I have with the everything-on-one-line approach style of programming (which I also do a lot) is that it's impossible to debug.
You don't get intermediate values and you don't get to set breakpoints at specific functions.
The readability aspect is not that big of a deal, I can read it just fine (usually).
However, since you write code only once and read and debug it a gazillion times I prefer to write my code so I can step through it.
Sometimes I put it back together for readability afterwards.
For example:
var filtered = myList.Where(...);
var ordered = filtered.OrderBy(...);
var result = ordered.ToList();
return result;
return myList
.Where(...)
.OrderBy(...)
.ToList();
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