@Roloef: Ist your sample array full of short texts? Because your example filters out any short text. Therefore your returning array is empty. You have to change the condition from element.length > 50 to element.length <= 50
On Tue, Jan 20, 2015 at 5:35 PM, Scott Ganyo <[email protected]> wrote: > That too. :) And... you could simplify your function if you wish: > > module.exports = function getShortMessages(messages) { > > function small_message(item) { return item.length < 50; } > > return messages.filter(small_message); > } > > Scott > > On Jan 20, 2015, at 8:27 AM, Adrien Risser <[email protected]> wrote: > > Filter is what you're looking for. > > > https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Array/filter > > On Tue, Jan 20, 2015 at 5:06 PM, Roelof Wobben <[email protected]> > wrote: > >> Hello, >> >> I try to learn functional javascript by following the functonial workshop >> of nodeschool. >> >> Now I have to filter out all the messages which lenght are shorter then >> 50. >> >> So I thought this would work : >> >> ~~~ >> >> module.exports = function getShortMessages(messages) { >> >> function small_message(item) >> >> { return item.length < 50 ; } >> >> >> messages.map(function(message) >> >> { return small_message(message) }) } >> >> but when I test it I see a empty array as answer >> >> Can someone explain where my thinking took the wrong path ? >> >> Roelof >> >> >> >> -- >> Job board: http://jobs.nodejs.org/ >> New group rules: >> https://gist.github.com/othiym23/9886289#file-moderation-policy-md >> Old group rules: >> https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines >> --- >> You received this message because you are subscribed to the Google Groups >> "nodejs" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/nodejs/2bb9460e-96ef-4160-98e5-afe713f6ea96%40googlegroups.com >> <https://groups.google.com/d/msgid/nodejs/2bb9460e-96ef-4160-98e5-afe713f6ea96%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Adrien Risser, > Freelance Node.js Consultant > M. +33 6 59 60 32 58 > > -- > Job board: http://jobs.nodejs.org/ > New group rules: > https://gist.github.com/othiym23/9886289#file-moderation-policy-md > Old group rules: > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > --- > You received this message because you are subscribed to the Google Groups > "nodejs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/nodejs/CAKGrCFhq%2BFFN655s2A4QbJ5fmPUK%3DNxOU1h9cxRAPsLekJkEYg%40mail.gmail.com > <https://groups.google.com/d/msgid/nodejs/CAKGrCFhq%2BFFN655s2A4QbJ5fmPUK%3DNxOU1h9cxRAPsLekJkEYg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > > > -- > Job board: http://jobs.nodejs.org/ > New group rules: > https://gist.github.com/othiym23/9886289#file-moderation-policy-md > Old group rules: > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > --- > You received this message because you are subscribed to the Google Groups > "nodejs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/nodejs/144D62D9-078A-43BA-8FE9-740E0859F5A1%40apigee.com > <https://groups.google.com/d/msgid/nodejs/144D62D9-078A-43BA-8FE9-740E0859F5A1%40apigee.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- Job board: http://jobs.nodejs.org/ New group rules: https://gist.github.com/othiym23/9886289#file-moderation-policy-md Old group rules: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/nodejs/CAMhY10pEdT6hYG8PPsSajpBYEzESkR5-Ek7i_kGV2PV5619SkA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
