I
I. Appel
August Derleth said:
Actually, rand() has some side-effects - changing the seeds of pseudo-random
generator.
So, such function is not pure-fuctional-programming-language-function.
Actually, rand() has some side-effects - changing the seeds of pseudo-random
generator.
So, such function is not pure-fuctional-programming-language-function.
I
I. Appel
August Derleth said:
Actually, rand() has some side-effects - changing the seeds of pseudo-random
generator.
So, such function is not pure-fuctional-programming-language-function.
I
I. Appel
Viktor Lofgren said:
To start understand such stuff you need to write code in LISP for a few
days, not more. After that it may become even _simpler_ to understand,
because it's not required to memorize order of precedence.
O
ozbear
Column 6 was for the continuation. Your code had to fit in columns
7 through 72. 73 through 80 was for a card sequence number, and
ignored by the compiler, IIRC.
Cobol also (originally) used column-positional syntax, Area A,
Area B, and so on.
Columns 1 through 6 (or 7) was for sequence numbers, followed by
Area A for paragraph names, and Area B for code, but its been a long
time.
At any rate, Dan is incorrect.
Oz
J
James Kanze
|> >|> Yet another bogus generalisation coming from Joona. Quoting
|> >|> from a post from a French mailing list:
|> >|> ton enfant ? quel age?
|> >Doubtlessly a typo. Or simply incorrect use.
|> The second is a typo. I work for a french bank, and the vast
|> majority of french expats use spaces before and after emphatic
|> punctuation. Only the anglicised french omit the space.
|> Remind me what this has to do with C....
The French also put spaces before the semicolons in C programs
.
|> >|> from a post from a French mailing list:
|> >|> ton enfant ? quel age?
|> >Doubtlessly a typo. Or simply incorrect use.
|> The second is a typo. I work for a french bank, and the vast
|> majority of french expats use spaces before and after emphatic
|> punctuation. Only the anglicised french omit the space.
|> Remind me what this has to do with C....
The French also put spaces before the semicolons in C programs
.
G
Guillaume
The second is a typo. I work for a french bank, and the vast majority of
Well, in fact, both are wrong and right at the same time.
Typographically speaking, the kind of spacing that should be used just
before a punctuation mark such as a question mark or an exclamation mark
is NOT the same as the spacing used between two words, for instance.
It should be a "quart de cadratin", which is much less wide.
Unfortunately, plain ASCII text doesn't have much notion of typographic
spacing. It only knows of a basic space, which is as wide as can be.
Thus, I consider putting extra spaces before punctuation marks
a typo when using plain ASCII text, and more esthetically pleasing
to the eye to omit them. French or not.
I especially hate those who put a space before a period. Like this:
"This is ****ed up ."
It's just confusing, ugly, and makes no typographic sense.
Well, in fact, both are wrong and right at the same time.
Typographically speaking, the kind of spacing that should be used just
before a punctuation mark such as a question mark or an exclamation mark
is NOT the same as the spacing used between two words, for instance.
It should be a "quart de cadratin", which is much less wide.
Unfortunately, plain ASCII text doesn't have much notion of typographic
spacing. It only knows of a basic space, which is as wide as can be.
Thus, I consider putting extra spaces before punctuation marks
a typo when using plain ASCII text, and more esthetically pleasing
to the eye to omit them. French or not.
I especially hate those who put a space before a period. Like this:
"This is ****ed up ."
It's just confusing, ugly, and makes no typographic sense.
R
Richard Bos
[ Please do not snip attribution lines of people whose text you leave in
your replies. I have no idea who wrote the following: ]
Pardon me: _you_ consider Python programs to be easier to read and
understand. Other people, amongst whom the twice-quoted contributer
above and myself, disagree.
Richard
your replies. I have no idea who wrote the following: ]
Pardon me: _you_ consider Python programs to be easier to read and
understand. Other people, amongst whom the twice-quoted contributer
above and myself, disagree.
Richard
I
I. Appel
Well, I had to place more IMO's, but check this:
foo = lambda x, y: [str (i+j) for (i,j) in zip(x,y)]
Well, it's not very clear, but how many lines of code in C
would be required to reproduce it? Types of x and y can be
either lists of lists, lists of strings, lists of numbers
or strings. And it maybe used for all that stuff.
I don't understand, how several dozens lines of code can be
better than ONE line of code in non-esoteric language.
Read "Succinctness is Power" and "Revenge of the Nerds" by Paul
Graham, if you want more.
Ivan.
foo = lambda x, y: [str (i+j) for (i,j) in zip(x,y)]
Well, it's not very clear, but how many lines of code in C
would be required to reproduce it? Types of x and y can be
either lists of lists, lists of strings, lists of numbers
or strings. And it maybe used for all that stuff.
I don't understand, how several dozens lines of code can be
better than ONE line of code in non-esoteric language.
Read "Succinctness is Power" and "Revenge of the Nerds" by Paul
Graham, if you want more.
Ivan.
Richard Bos said:
D
Dan Pop
In said:
Why? None of these examples count as indentation being semantically
significant. You're merely confusing the fixed format of certain
languages and indentation.
FYI: I've used both fixed format Fortran and fixed format assemblers,
but fixed format has nothing to do with *indentation* being semantically
significant.
Dan
D
Dave Vandervies
I see no ambiguity here. Things that may not match what you want, yes.
If you hate C so much, why do you still use it?
There is always precisely one statement controlled by if, for, while, or
do..while (and even switch, though it's rather useless there). That one
statement may be a simple expression statement or a compound statement;
compound statements (by definition) begin with a '{' and end with a '}'.
struct and union declarations don't involve any statements, so your
claim is meaningless when applied to that.
If a statement has multiple side effects whose order is relevant,
it shouldn't've been written as a single statement in the first place.
If the only purpose of defining something is so that you can look at the
language definition to find out what bad code is really doing, it's not
worth defining.
Is there any reason why it should be defined in some particular way?
If you want sign extension of signed integers, use the division operator;
any self-respecting compiler will use a shift instruction for that where
it's appropriate. If you want to move the bits around without worrying
about sign bits, use unsigned integers and avoid the sign bit entirely.
So? Do you care if the machine gives you 16 more bits than you need?
So? Do you care if the system gives you 2 more bits than you need?
A number that, if you think about it hard enough, will give you some clue
about whether char is signed and possibly about how signed integers are
represented internally.
You're lying to printf; what did you expect, a compiler error saying
"That's not what you meant"?
dave
S
Slartibartfast
TTCN. It's mainstream if you work in telecoms, but, as your comment
implies, it's unpleasant in the extreme.
G
Guillaume
Pascal and C are of the same age almost. Pascal maybe 2-3 years older than
Well, technically, you're right. Pascal was officially unveiled at about
the same time as C appeared, but the whole history behind Pascal (and
Ada) is a lot older.
To me, Pascal remains the language of choice to teach a structured,
procedural language. C was originally made to be used by experienced
programmers, and (even if that will raise some eyebrows here and there)
I think this still applies nowadays.
That's a matter of taste, I guess. Many of us seem to disagree, though.
As for the indentation-oriented syntax, I strongly advise against it.
To me, it's very unnatural. In the huge majority of languages (natural
or programming ones), spaces are meant to be separators and esthetic
elements. Even if indenting has become natural for most programmers
when writing different code blocks in most languages (C, Pascal, Ada...)
I still think it's a visual improvement for readability - and shouldn't
be anything else. I really can't figure out the whole rationale behind
the Python syntax. And even if you claim that "such problems as leaving
behind tabs or spaces, it's generally no problem", it's not quite what
I have in mind in terms of "syntactic robustness".
Well, technically, you're right. Pascal was officially unveiled at about
the same time as C appeared, but the whole history behind Pascal (and
Ada) is a lot older.
To me, Pascal remains the language of choice to teach a structured,
procedural language. C was originally made to be used by experienced
programmers, and (even if that will raise some eyebrows here and there)
I think this still applies nowadays.
That's a matter of taste, I guess. Many of us seem to disagree, though.
As for the indentation-oriented syntax, I strongly advise against it.
To me, it's very unnatural. In the huge majority of languages (natural
or programming ones), spaces are meant to be separators and esthetic
elements. Even if indenting has become natural for most programmers
when writing different code blocks in most languages (C, Pascal, Ada...)
I still think it's a visual improvement for readability - and shouldn't
be anything else. I really can't figure out the whole rationale behind
the Python syntax. And even if you claim that "such problems as leaving
behind tabs or spaces, it's generally no problem", it's not quite what
I have in mind in terms of "syntactic robustness".
A
Alan Balmer
Fortran IV had a fixed format for cards, but indentation was not
meaningful. The code area started in column 7, but you could use
whitespace any way you liked within that constraint. It did not assign
any semantics to indentation, as Python does.
BTW, your attributions are messed up - I didn't write anything you
quoted.
J
James Kanze
|> > The second is a typo. I work for a french bank, and the vast
|> > majority of french expats use spaces before and after emphatic
|> > punctuation. Only the anglicised french omit the space.
|> Well, in fact, both are wrong and right at the same time.
|> Typographically speaking, the kind of spacing that should be used
|> just before a punctuation mark such as a question mark or an
|> exclamation mark is NOT the same as the spacing used between two
|> words, for instance. It should be a "quart de cadratin", which is
|> much less wide.
Not much less. A "cadratin" is a quad in English -- originally, a
square piece of lead, whose width is the same as its height. The space
before "high" punctuation is an "espace fine", nominally a fourth of a
quad. The nominal width of a space between words is a third of a quad.
For twelve point type, we're talking about 3pt vs. 4pt. And the 4pt
interword space can be stretched OR SHRUNK somewhat to make the line
fit; on a tightly spaced line, it takes a good eye to see the difference
between an espace mot and an espace fine.
|> Unfortunately, plain ASCII text doesn't have much notion of
|> typographic spacing. It only knows of a basic space, which is as
|> wide as can be.
Agreed. It's even wider than a normal word space.
|> Thus, I consider putting extra spaces before punctuation marks a
|> typo when using plain ASCII text, and more esthetically pleasing to
|> the eye to omit them. French or not.
As someone used to reading French, I find it jarring if there isn't some
space. And the space I expect isn't that far from the normal word space
that it bothers me.
Of course, when I"m typing or reading English or German, I use different
rules.
|> I especially hate those who put a space before a period. Like this:
|> "This is ****ed up ."
Quite. At least in the typographical conventions I'm familiar with:
French, German and English. Given the variety, I wouldn't really
surprise me if this were the norm for some language, however.
|> > majority of french expats use spaces before and after emphatic
|> > punctuation. Only the anglicised french omit the space.
|> Well, in fact, both are wrong and right at the same time.
|> Typographically speaking, the kind of spacing that should be used
|> just before a punctuation mark such as a question mark or an
|> exclamation mark is NOT the same as the spacing used between two
|> words, for instance. It should be a "quart de cadratin", which is
|> much less wide.
Not much less. A "cadratin" is a quad in English -- originally, a
square piece of lead, whose width is the same as its height. The space
before "high" punctuation is an "espace fine", nominally a fourth of a
quad. The nominal width of a space between words is a third of a quad.
For twelve point type, we're talking about 3pt vs. 4pt. And the 4pt
interword space can be stretched OR SHRUNK somewhat to make the line
fit; on a tightly spaced line, it takes a good eye to see the difference
between an espace mot and an espace fine.
|> Unfortunately, plain ASCII text doesn't have much notion of
|> typographic spacing. It only knows of a basic space, which is as
|> wide as can be.
Agreed. It's even wider than a normal word space.
|> Thus, I consider putting extra spaces before punctuation marks a
|> typo when using plain ASCII text, and more esthetically pleasing to
|> the eye to omit them. French or not.
As someone used to reading French, I find it jarring if there isn't some
space. And the space I expect isn't that far from the normal word space
that it bothers me.
Of course, when I"m typing or reading English or German, I use different
rules.
|> I especially hate those who put a space before a period. Like this:
|> "This is ****ed up ."
Quite. At least in the typographical conventions I'm familiar with:
French, German and English. Given the variety, I wouldn't really
surprise me if this were the norm for some language, however.
K
Keith Thompson
Guillaume said:
C grew out of the same history as Pascal; they're both descendents of
Algol, though C is less of a direct descendent. C's declaration
syntax, at least in its simple forms, is more Algol-like than Pascal's
is:
Algol: integer i;
C: int i;
Pascal: i: integer;
(As long as we have an '[OT]' tag on this thread ...)
I haven't played with Python enough to form a strong opinion about its
indentation-oriented syntax, but I think I like it. When I program in
a language that expressions nesting with delimiters (begin/end, {/},
case/esac), I maintain strictly consistent indentation anyway. I go
to the effort of indenting my code properly, and the compiler doesn't
even warn me if I get it wrong. Python lets me omit the delimiters;
the indentation is exactly what it would have been if Python required
delimiters as well.
C's use of delimiters to denote nesting allows some flexibility that
Python doesn't, but I see no virtue in that flexibility. C allows
incorrect, or even misleading, indentation:
if (cond1)
if (cond2)
some_statement;
else
some_other_statement;
I
I. Appel
Guillaume said:
The concepts behind them are almost the same. Maybe C is a bit more
influenced
by low-level programming and functional programming, but it's as structured
as Pascal.
I can't disagree with you. When I studied programming at my university,
it was really hard for inexperienced people to code in C. I suppose, it
would be pretty simpler for them to learn Pascal first.
Some Python and Java zealots suppose their stuff to be the best learning
language instead of Pascal, but I'm not agree.
I've seen code in C and Java written by several Python-haters. Most of them
don't use indents at all, so their code is pretty hard to read. See below.
Well, main idea behind Python's syntax is "we use indentation anyway (most
of
us at least), so what's the reason to make syntax redundant and to use
_both_
indents and delimiters?"
Are you agree?
O
ozbear
Nope. "Fixed format" is just a ruse to cover up what is actually
fixed indentation. If those rules were violated you didn't even
get to what was semantically equivalent because you never got past
compilation.
If you put your Fortran continuation character in the wrong column
you could easily end up with errors.
The point is that those columns had meaning to the compiler hence one
had to indent, hence indentation had meaning.
Oz
D
Dik T. Winter
Lessee. C if offspring from Jovial and the kind, which is offspring from
Algol 58. Pascal became because in the depelopment of Algol 68 Wirth did
not agree with the direction the committee was going.
A
Alan Balmer
As you said, it's not very clear ;-) Actually, you'll have to define
"better" before you're qualified to offer an opinion.
A
Alan Balmer
You need to expand your circle of acquaintances
Most C and Javaprogrammers (in fact, all) that I know use indents, whether or not
they hate Python.
Nope.