MESSAGE
| DATE | 2016-04-27 |
| FROM | Paul Li
|
| SUBJECT | Re: [Hangout-NYLXS] hangout Digest, Vol 7, Issue 27
|
Hi Ruben,
Are you still conducting Linux kernel C lessons?
Paul
Please excuse typos. Sent via mobile.
> On Apr 27, 2016, at 12:00 PM, "hangout-request-at-nylxs.com" wrote:
>
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> Today's Topics:
>
> 1. Re: error: unclosed character literal (Christopher League)
> 2. Don't forget to register: Is Your DevOps Team Employing
> Real-Time Communication? (IEEE CS Webinars)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 26 Apr 2016 09:48:46 -0400
> From: Christopher League
> To: Ruben Safir , Hangout
> Subject: Re: [Hangout-NYLXS] error: unclosed character literal
> Message-ID: <87bn4wqy4h.fsf-at-lydrik.home.lan>
> Content-Type: text/plain; charset="utf-8"
>
>
> Yeah, I think this is because the single quote only works for a single
> character in C/Java so `'>='` is not allowed. Assuming the type of `op`
> is `String`, then you can do `op == ">="` or probably even better,
> `op.equals(">=")`.
>
> Comparing strings in Java with `==` is not always reliable, because it
> uses object (pointer) equality. If they are two different string
> objects, they'll register as not-equal, even if they have the same
> characters. Therefore, `op.equals(">=")` is recommended, because it
> actually looks at the characters. (Just like in C, you use `strcmp`
> instead of `==` for the same reason.)
>
> Another possibility that Java supports and C doesn't is that you can use
> a string in a switch:
>
> switch(op) {
> case ">=":
> case ">":
> // etc.
> break
> }
>
> and it compiles that to use `op.equals()` behind the scenes.
>
> CL
>
> Ruben Safir writes:
>
>> TypeCheckingVisitor.java:61: error: unclosed character literal
>> if(op == '>' || op == '<' || op == '<=' || op == '>=' ){
>>
>>
>> The editor also indicates a parsing problem in the Java but I am at a loss.
>>
>> '<' seems to work
>>
>>
>> This is the code snippet
>>
>> //Comparison Operators
>> ?if(op == '>' || op == '<' || op == '<=' || op == '>=' ){
>> ?if( (leftType == Type.INT && rightType == Type.INT) || (leftType== Type.FLOAT || rightType== Type.FLOAT)|| (leftType == Type.INT && rightType == Type.FLOAT)|| (leftType == Type.FLOAT && rightType == Type.INT ) ){
>> ?return trace(ctx, Type.BOOL);
>> ?}
>> ? ? ?return typeMismatch(ctx, leftType, rightType);
>>
>> ?}
>>
>> --
>> So many immigrant groups have swept through our town
>> that Brooklyn, like Atlantis, reaches mythological
>> proportions in the mind of the world - RI Safir 1998
>> http://www.mrbrklyn.com
>>
>> DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
>> http://www.nylxs.com - Leadership Development in Free Software
>> http://www2.mrbrklyn.com/resources - Unpublished Archive
>> http://www.coinhangout.com - coins!
>> http://www.brooklyn-living.com
>>
>> Being so tracked is for FARM ANIMALS and and extermination camps,
>> but incompatible with living as a free human being. -RI Safir 2013
> -------------- next part --------------
>
> Yeah, I think this is because the single quote only works for a single
> character in C/Java so '>=' is not allowed. Assuming the type of op is
> String, then you can do op == ">=" or probably even better,
> op.equals(">=").
>
> Comparing strings in Java with == is not always reliable, because it
> uses object (pointer) equality. If they are two different string
> objects, they'll register as not-equal, even if they have the same
> characters. Therefore, op.equals(">=") is recommended, because it
> actually looks at the characters. (Just like in C, you use strcmp
> instead of == for the same reason.)
>
> Another possibility that Java supports and C doesn't is that you can
> use a string in a switch:
> switch(op) {
> case ">=":
> case ">":
> // etc.
> break
> }
>
> and it compiles that to use op.equals() behind the scenes.
>
> CL
>
> Ruben Safir [1]ruben-at-mrbrklyn.com writes:
>
> TypeCheckingVisitor.java:61: error: unclosed character literal if(op
> == `>' || op == `<' || op == `<=' || op == `>=' ){
>
> The editor also indicates a parsing problem in the Java but I am at
> a loss.
>
> `<' seems to work
>
> This is the code snippet
>
> //Comparison Operators ?if(op == `>' || op == `<' || op == `<=' ||
> op == `>=' ){ ?if( (leftType == Type.INT && rightType == Type.INT)
> || (leftType== Type.FLOAT || rightType== Type.FLOAT)|| (leftType ==
> Type.INT && rightType == Type.FLOAT)|| (leftType == Type.FLOAT &&
> rightType == Type.INT ) ){ ?return trace(ctx, Type.BOOL); ?} ? ?
> ?return typeMismatch(ctx, leftType, rightType);
> ?}
>
> - So many immigrant groups have swept through our town that
> Brooklyn, like Atlantis, reaches mythological proportions in the
> mind of the world - RI Safir 1998 http://www.mrbrklyn.com
>
> DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
> http://www.nylxs.com - Leadership Development in Free Software
> http://www2.mrbrklyn.com/resources - Unpublished Archive
> http://www.coinhangout.com - coins! http://www.brooklyn-living.com
>
> Being so tracked is for FARM ANIMALS and and extermination camps,
> but incompatible with living as a free human being. -RI Safir 2013
>
> References
>
> 1. mailto:ruben-at-mrbrklyn.com
> -------------- next part --------------
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>
> ------------------------------
>
> Message: 2
> Date: Wed, 27 Apr 2016 07:53:34 +0000
> From: IEEE CS Webinars
> To: Ruben Safir
> Subject: [Hangout-NYLXS] Don't forget to register: Is Your DevOps Team
> Employing Real-Time Communication?
> Message-ID: <20160427075329.29356.71518.9D902B77-at-computer.org>
> Content-Type: text/plain; charset="utf-8"
>
> Having trouble reading this email? View it in your browser - http://news.computer.org/bf/EmailCampaign.php?lf1=7951541907c49375772807b56467580&urlid=516467
>
> ?
> [How Temenos Manages Open Source Use, the Easy Way](http://www.whitesourcesoftware.com/ieee-webinar?lf1track=1 )
> ?
> (http://www.whitesourcesoftware.com/ieee-webinar?lf1track=1 )
> ?
>
> TIME: May 26, 9:00AM PT / 12:00PM ET
>
> Open source components are increasingly becoming a crucial part of software development.
>
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>
> The extensive use of open source in commercial software requires engineering executives to set processes and measures that will enable their organization and their customers to make the most of what open source can offer without assuming the accompanying risks.
>
> These essential measures include keeping up-to-date open source inventory, managing licenses, and tracking security vulnerabilities and new versions. The significant growth in open source usage makes it impossible to manage these things manually, by using a spreadsheet.
>
> Attendees will learn:
> How and why open source should be managed Open source management as part of the continuous development environment How to easily set an enterprise-wide open source policy and automatically enforce it Martin Bailey, Product Director ? Enterprise Software, Temenos Group AG
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>
> Date: March 26,
> 9:00AM PT / 12:00PM ET
>
>
> Presented by: Martin Bailey, Product Director ? Enterprise Software, Temenos Group AG and Rami Sass, CEO and Co-Founder, WhiteSource
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> -------------- next part --------------
>
> Having trouble reading this email? [1]View it in your browser.
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> IEEE Computer Society Webinar Series
>
> [2]Accelerating DevOps with Real-Time Communication
> Corporate Perimeter
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> ------------------------------
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> End of hangout Digest, Vol 7, Issue 27
> **************************************
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