May 2019 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Bloc of code in tiers programming language

by TomaÅ¾ Turk

Here's a nice description about JS: https://www.vinta.com.br/blog/2015/javascript-lambda-and-arrow-functions/ Best wishes, Tomaz ------ Original Message ------ From: "Hilaire" <hilaire(a)drgeo.eu> To: pharo-users(a)lists.pharo.org Sent: 15.5.2019 18:54:58 Subject: Re: [Pharo-users] Bloc of code in tiers programming language >Hi, > >It is an important restriction on Python. So Javasctip has several way >of doing lambda, correct? > >Thanks > >Hilaire > >Le 15/05/2019 Ã 16:19, Richard O'Keefe a Ã©crit : >> One point worth making is that Python lambdas are artificially restricted: >> the body of a Python lambda may only be a single expression, not a >> sequence >> of statements. This restriction is for ideological reasons (the BDFL does >> not *want* you to do that) not for technical reasons. Lisp and Algol 68 >> were doing lambda expressions in the 60s. >> >> As well as function (x, y) { ... }, >> modern Javascript has (x, y) => .... >> with subtly different semantics. >> >-- >Dr. Geo >http://drgeo.eu > > >

May 15, 2019

Re: [Pharo-users] Bloc of code in tiers programming language

by Hilaire

Hi, It is an important restriction on Python. So Javasctip has several way of doing lambda, correct? Thanks Hilaire Le 15/05/2019 Ã 16:19, Richard O'Keefe a Ã©critÂ : > One point worth making is that Python lambdas are artificially restricted: > the body of a Python lambda may only be a single expression, not a > sequence > of statements.Â This restriction is for ideological reasons (the BDFL does > not *want* you to do that) not for technical reasons.Â Lisp and Algol 68 > were doing lambda expressions in the 60s. > > As well as function (x, y) { ... }, > modern Javascript has (x, y) => .... > with subtly different semantics. > -- Dr. Geo http://drgeo.eu

May 15, 2019

Re: [Pharo-users] Pharo download with wget

by BrunoBB

Hi, Thanks to all for information, this is finally fixed. On Centos 7.6 the fix is: sudo ln -s /usr/lib64/libcurl.so.4 /usr/lib64/libcurl-gnutls.so.4 In process i also executed (not sure if it had a direct impact on the fix): sudo yum install libgit2 regards, bruno -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

May 15, 2019

Re: [Pharo-users] Bloc of code in tiers programming language

by Hilaire

Thanks guys. -- Dr. Geo http://drgeo.eu

May 15, 2019

Re: [Pharo-users] Pharo download with wget

by BrunoBB

Sorry i forgot to mention Linux is Centos 7.6 regards, bruno -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

May 15, 2019

Re: [Pharo-users] Pharo download with wget

by BrunoBB

Ben, Thanks for the links, i will research further on this. Ted, libcurl is v4 [gemstone@localhost ~]$ locate libcurl.so /usr/lib64/libcurl.so /usr/lib64/libcurl.so.4 /usr/lib64/libcurl.so.4.3.0 regards, bruno -- Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html

May 15, 2019

Re: [Pharo-users] Bloc of code in tiers programming language

by Richard O'Keefe

One point worth making is that Python lambdas are artificially restricted: the body of a Python lambda may only be a single expression, not a sequence of statements. This restriction is for ideological reasons (the BDFL does not *want* you to do that) not for technical reasons. Lisp and Algol 68 were doing lambda expressions in the 60s. As well as function (x, y) { ... }, modern Javascript has (x, y) => ... with subtly different semantics. On Thu, 16 May 2019 at 01:03, Hilaire <hilaire(a)drgeo.eu> wrote: > Hi, > > We, Smalltalkers, use bloc of code as easily as we breathe air. > > I am writing an article on Smalltalk programming for a French > mathematics teachers magazine. > > To illustrate the simplicity of Smalltalk, I would like to compare how > the bloc of code 'f' and 'df' below will be implemented in Javascript > and Python: > > > f := [ :x | x cos + x ]. > df := [ :x | (f value: x + 1e-8) - (f value: x) * 1e8]. > > Here f is a way to implement a function and df its derivate. > > Do some of you knows how it will be written in Javascript and Python > with their own ad-hoc anonymous function? > > Thanks > > Hilaire > > -- > Dr. Geo > http://drgeo.eu > > > >

May 15, 2019

Re: [Pharo-users] Bloc of code in tiers programming language

by TomaÅ¾ Turk

In javascript I believe is var f = function(x) { return Math.cos(x) + x; } var df = function(x) { return f(x + 1e-8) - f(x) * 1e8; } Best wishes, Tomaz ------ Original Message ------ From: "Atharva Khare" <khareatharva(a)gmail.com> To: "Any question about pharo is welcome" <pharo-users(a)lists.pharo.org> Sent: 15.5.2019 15:26:11 Subject: Re: [Pharo-users] Bloc of code in tiers programming language >Hey, > >I think in python, you use Lambda Expressions. Here is how I would do >it in python3: >import math >f = lambda x: math.cos(x) + x >d_f = lambda x: (f(x + 1e-8) - f(x)) * 1e8 > > > >On Wed, May 15, 2019 at 6:33 PM Hilaire <hilaire(a)drgeo.eu> wrote: >>Hi, >> >>We, Smalltalkers, use bloc of code as easily as we breathe air. >> >>I am writing an article on Smalltalk programming for a French >>mathematics teachers magazine. >> >>To illustrate the simplicity of Smalltalk, I would like to compare how >>the bloc of code 'f' and 'df' below will be implemented in Javascript >>and Python: >> >> >>f := [ :x | x cos + x ]. >>df := [ :x | (f value: x + 1e-8) - (f value: x) * 1e8]. >> >>Here f is a way to implement a function and df its derivate. >> >>Do some of you knows how it will be written in Javascript and Python >>with their own ad-hoc anonymous function? >> >>Thanks >> >>Hilaire >> >>-- >>Dr. Geo >>http://drgeo.eu >> >> >>

May 15, 2019

Re: [Pharo-users] Bloc of code in tiers programming language

by Atharva Khare

Hey, I think in python, you use Lambda Expressions. Here is how I would do it in python3: import math f = lambda x: math.cos(x) + x d_f = lambda x: (f(x + 1e-8) - f(x)) * 1e8 On Wed, May 15, 2019 at 6:33 PM Hilaire <hilaire(a)drgeo.eu> wrote: > Hi, > > We, Smalltalkers, use bloc of code as easily as we breathe air. > > I am writing an article on Smalltalk programming for a French > mathematics teachers magazine. > > To illustrate the simplicity of Smalltalk, I would like to compare how > the bloc of code 'f' and 'df' below will be implemented in Javascript > and Python: > > > f := [ :x | x cos + x ]. > df := [ :x | (f value: x + 1e-8) - (f value: x) * 1e8]. > > Here f is a way to implement a function and df its derivate. > > Do some of you knows how it will be written in Javascript and Python > with their own ad-hoc anonymous function? > > Thanks > > Hilaire > > -- > Dr. Geo > http://drgeo.eu > > > >

May 15, 2019

Bloc of code in tiers programming language

by Hilaire

Hi, We, Smalltalkers, use bloc of code as easily as we breathe air. I am writing an article on Smalltalk programming for a French mathematics teachers magazine. To illustrate the simplicity of Smalltalk, I would like to compare how the bloc of code 'f' and 'df' below will be implemented in Javascript and Python: f := [ :x | x cos + x ]. df := [ :x | (f value: x + 1e-8) - (f value: x) * 1e8]. Here f is a way to implement a function and df its derivate. Do some of you knows how it will be written in Javascript and Python with their own ad-hoc anonymous function? Thanks Hilaire -- Dr. Geo http://drgeo.eu

May 15, 2019