add examples of functions to the signal producers section
add examples of functions to the signal producers section

lixar/ReactiveCocoa,zzzworm/ReactiveCocoa,sugar2010/ReactiveCocoa,andersio/ReactiveCocoa,FelixYin66/ReactiveCocoa,Ray0218/ReactiveCocoa,AlanJN/ReactiveCocoa,luerhouhou/ReactiveCocoa,Ethan89/ReactiveCocoa,add715/ReactiveCocoa,Rupert-RR/ReactiveCocoa,zxq3220122/ReactiveCocoa,Farteen/ReactiveCocoa,gengjf/ReactiveCocoa,cogddo/ReactiveCocoa,ioshger0125/ReactiveCocoa,ceekayel/ReactiveCocoa,ohwutup/ReactiveCocoa,Ricowere/ReactiveCocoa,shaohung001/ReactiveCocoa,Pingco/ReactiveCocoa,PSPDFKit-labs/ReactiveCocoa,Liquidsoul/ReactiveCocoa,luerhouhou/ReactiveCocoa,sandyway/ReactiveCocoa,ohwutup/ReactiveCocoa,fhchina/ReactiveCocoa,ohwutup/ReactiveCocoa,kaylio/ReactiveCocoa,Farteen/ReactiveCocoa,Liquidsoul/ReactiveCocoa,howandhao/ReactiveCocoa,esttorhe/ReactiveCocoa,tonyarnold/ReactiveCocoa,ericzhou2008/ReactiveCocoa,llb1119/test,yaoxiaoyong/ReactiveCocoa,natan/ReactiveCocoa,DongDongDongDong/ReactiveCocoa,JackLian/ReactiveCocoa,bensonday/ReactiveCocoa,JohnJin007/ReactiveCocoa,vincentiss/ReactiveCocoa,sugar2010/ReactiveCocoa,hoanganh6491/ReactiveCocoa,mxxiv/ReactiveCocoa,GuitarPlayer-Ma/ReactiveCocoa,fhchina/ReactiveCocoa,ericzhou2008/ReactiveCocoa,paulyoung/ReactiveCocoa,alvinvarghese/ReactiveCocoa,WEIBP/ReactiveCocoa,tzongw/ReactiveCocoa,yoichitgy/ReactiveCocoa,taylormoonxu/ReactiveCocoa,zhaoguohui/ReactiveCocoa,Juraldinio/ReactiveCocoa,stupidfive/ReactiveCocoa,hbucius/ReactiveCocoa,zhukaixy/ReactiveCocoa,tonyli508/ReactiveCocoa,WEIBP/ReactiveCocoa,jackywpy/ReactiveCocoa,kaylio/ReactiveCocoa,Rupert-RR/ReactiveCocoa,longv2go/ReactiveCocoa,gengjf/ReactiveCocoa,zhiwen1024/ReactiveCocoa,hoanganh6491/ReactiveCocoa,clg0118/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,ddc391565320/ReactiveCocoa,cogddo/ReactiveCocoa,yangshengchaoios/ReactiveCocoa,taylormoonxu/ReactiveCocoa,nikita-leonov/ReactiveCocoa,zhenlove/ReactiveCocoa,natan/ReactiveCocoa,KuPai32G/ReactiveCocoa,eyu1988/ReactiveCocoa,zxq3220122/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,victorlin/ReactiveCocoa,sdhzwm/ReactiveCocoa,FelixYin66/ReactiveCocoa,qq644531343/ReactiveCocoa,zhiwen1024/ReactiveCocoa,yytong/ReactiveCocoa,huiping192/ReactiveCocoa,walkingsmarts/ReactiveCocoa,jam891/ReactiveCocoa,nickcheng/ReactiveCocoa,CQXfly/ReactiveCocoa,jrmiddle/ReactiveCocoa,sugar2010/ReactiveCocoa,jsslai/ReactiveCocoa,cnbin/ReactiveCocoa,leelili/ReactiveCocoa,llb1119/test,dskatz22/ReactiveCocoa,jsslai/ReactiveCocoa,kiurentu/ReactiveCocoa,SanChain/ReactiveCocoa,xumaolin/ReactiveCocoa,tornade0913/ReactiveCocoa,vincentiss/ReactiveCocoa,natestedman/ReactiveCocoa,eyu1988/ReactiveCocoa,xiaoliyang/ReactiveCocoa,cstars135/ReactiveCocoa,calebd/ReactiveCocoa,DreamHill/ReactiveCocoa,JohnJin007/ReactiveCocoa,shaohung001/ReactiveCocoa,add715/ReactiveCocoa,on99/ReactiveCocoa,Khan/ReactiveCocoa,tiger8888/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,Juraldinio/ReactiveCocoa,natan/ReactiveCocoa,xulibao/ReactiveCocoa,liufeigit/ReactiveCocoa,richeterre/ReactiveCocoa,AlanJN/ReactiveCocoa,wpstarnice/ReactiveCocoa,stevielu/ReactiveCocoa,itschaitanya/ReactiveCocoa,llb1119/test,towik/ReactiveCocoa,ikesyo/ReactiveCocoa,bscarano/ReactiveCocoa,j364960953/ReactiveCocoa,dachaoisme/ReactiveCocoa,hilllinux/ReactiveCocoa,sujeking/ReactiveCocoa,SuPair/ReactiveCocoa,Ethan89/ReactiveCocoa,pzw224/ReactiveCocoa,tonyli508/ReactiveCocoa,cogddo/ReactiveCocoa,GuitarPlayer-Ma/ReactiveCocoa,chieryw/ReactiveCocoa,qq644531343/ReactiveCocoa,cstars135/ReactiveCocoa,icepy/ReactiveCocoa,tornade0913/ReactiveCocoa,kevin-zqw/ReactiveCocoa,DreamHill/ReactiveCocoa,fanghao085/ReactiveCocoa,loupman/ReactiveCocoa,GuitarPlayer-Ma/ReactiveCocoa,sdhzwm/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,zzqiltw/ReactiveCocoa,icepy/ReactiveCocoa,CQXfly/ReactiveCocoa,almassapargali/ReactiveCocoa,imkerberos/ReactiveCocoa,shaohung001/ReactiveCocoa,rpowelll/ReactiveCocoa,add715/ReactiveCocoa,tonyli508/ReactiveCocoa,tornade0913/ReactiveCocoa,lixar/ReactiveCocoa,jaylib/ReactiveCocoa,huiping192/ReactiveCocoa,wangqi211/ReactiveCocoa,dz1111/ReactiveCocoa,xulibao/ReactiveCocoa,BlessNeo/ReactiveCocoa,emodeqidao/ReactiveCocoa,nickcheng/ReactiveCocoa,LHDsimon/ReactiveCocoa,zzqiltw/ReactiveCocoa,mtxs007/ReactiveCocoa,richeterre/ReactiveCocoa,Eveian/ReactiveCocoa,imkerberos/ReactiveCocoa,Juraldinio/ReactiveCocoa,zhukaixy/ReactiveCocoa,shuxiashusheng/ReactiveCocoa,monkeydbobo/ReactiveCocoa,chao95957/ReactiveCocoa,buildo/ReactiveCocoa,sujeking/ReactiveCocoa,paulyoung/ReactiveCocoa,victorlin/ReactiveCocoa,ericzhou2008/ReactiveCocoa,leichunfeng/ReactiveCocoa,juliangrosshauser/ReactiveCocoa,kiurentu/ReactiveCocoa,ceekayel/ReactiveCocoa,OnTheWay1988/ReactiveCocoa,luerhouhou/ReactiveCocoa,chao95957/ReactiveCocoa,JohnJin007/ReactiveCocoa,xiaoliyang/ReactiveCocoa,towik/ReactiveCocoa,libiao88/ReactiveCocoa,SanChain/ReactiveCocoa,mattpetters/ReactiveCocoa,tiger8888/ReactiveCocoa,SuPair/ReactiveCocoa,fhchina/ReactiveCocoa,jaylib/ReactiveCocoa,smilypeda/ReactiveCocoa,jaylib/ReactiveCocoa,DongDongDongDong/ReactiveCocoa,on99/ReactiveCocoa,wangqi211/ReactiveCocoa,leichunfeng/ReactiveCocoa,natestedman/ReactiveCocoa,mxxiv/ReactiveCocoa,Rupert-RR/ReactiveCocoa,Ethan89/ReactiveCocoa,mtxs007/ReactiveCocoa,SuPair/ReactiveCocoa,jackywpy/ReactiveCocoa,cnbin/ReactiveCocoa,juliangrosshauser/ReactiveCocoa,zhigang1992/ReactiveCocoa,msdgwzhy6/ReactiveCocoa,KuPai32G/ReactiveCocoa,DongDongDongDong/ReactiveCocoa,victorlin/ReactiveCocoa,OneSmallTree/ReactiveCocoa,ztchena/ReactiveCocoa,Ricowere/ReactiveCocoa,mattpetters/ReactiveCocoa,kaylio/ReactiveCocoa,beni55/ReactiveCocoa,alvinvarghese/ReactiveCocoa,hj3938/ReactiveCocoa,stevielu/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,WEIBP/ReactiveCocoa,xiaobing2007/ReactiveCocoa,SanChain/ReactiveCocoa,ceekayel/ReactiveCocoa,alvinvarghese/ReactiveCocoa,yangyangluoluo/ReactiveCocoa,wpstarnice/ReactiveCocoa,on99/ReactiveCocoa,hbucius/ReactiveCocoa,RuiAAPeres/ReactiveCocoa,LHDsimon/ReactiveCocoa,clg0118/ReactiveCocoa,ddc391565320/ReactiveCocoa,xumaolin/ReactiveCocoa,huiping192/ReactiveCocoa,PSPDFKit-labs/ReactiveCocoa,nikita-leonov/ReactiveCocoa,zhenlove/ReactiveCocoa,hoanganh6491/ReactiveCocoa,CCOOOOLL/ReactiveCocoa,CCOOOOLL/ReactiveCocoa,BlessNeo/ReactiveCocoa,200895045/ReactiveCocoa,isghe/ReactiveCocoa,shuxiashusheng/ReactiveCocoa,mxxiv/ReactiveCocoa,zzqiltw/ReactiveCocoa,liufeigit/ReactiveCocoa,jeelun/ReactiveCocoa,jrmiddle/ReactiveCocoa,almassapargali/ReactiveCocoa,ShawnLeee/ReactiveCocoa,CQXfly/ReactiveCocoa,calebd/ReactiveCocoa,leelili/ReactiveCocoa,hj3938/ReactiveCocoa,j364960953/ReactiveCocoa,jrmiddle/ReactiveCocoa,dz1111/ReactiveCocoa,liufeigit/ReactiveCocoa,stupidfive/ReactiveCocoa,Pingco/ReactiveCocoa,jsslai/ReactiveCocoa,yangyangluoluo/ReactiveCocoa,dullgrass/ReactiveCocoa,stupidfive/ReactiveCocoa,dullgrass/ReactiveCocoa,lixar/ReactiveCocoa,yangshengchaoios/ReactiveCocoa,sandyway/ReactiveCocoa,richeterre/ReactiveCocoa,bscarano/ReactiveCocoa,sandyway/ReactiveCocoa,msdgwzhy6/ReactiveCocoa,zzzworm/ReactiveCocoa,CCOOOOLL/ReactiveCocoa,Liquidsoul/ReactiveCocoa,OneSmallTree/ReactiveCocoa,itschaitanya/ReactiveCocoa,tzongw/ReactiveCocoa,xiaobing2007/ReactiveCocoa,DreamHill/ReactiveCocoa,paulyoung/ReactiveCocoa,dullgrass/ReactiveCocoa,Ray0218/ReactiveCocoa,goodheart/ReactiveCocoa,FelixYin66/ReactiveCocoa,isghe/ReactiveCocoa,yoichitgy/ReactiveCocoa,ikesyo/ReactiveCocoa,zzzworm/ReactiveCocoa,BlessNeo/ReactiveCocoa,gengjf/ReactiveCocoa,clg0118/ReactiveCocoa,goodheart/ReactiveCocoa,takeshineshiro/ReactiveCocoa,zhaoguohui/ReactiveCocoa,calebd/ReactiveCocoa,jam891/ReactiveCocoa,yaoxiaoyong/ReactiveCocoa,pzw224/ReactiveCocoa,LHDsimon/ReactiveCocoa,leelili/ReactiveCocoa,eyu1988/ReactiveCocoa,monkeydbobo/ReactiveCocoa,stevielu/ReactiveCocoa,Eveian/ReactiveCocoa,andersio/ReactiveCocoa,wangqi211/ReactiveCocoa,zhiwen1024/ReactiveCocoa,zhenlove/ReactiveCocoa,nickcheng/ReactiveCocoa,AlanJN/ReactiveCocoa,qq644531343/ReactiveCocoa,rpowelll/ReactiveCocoa,jaylib/ReactiveCocoa,walkingsmarts/ReactiveCocoa,KJin99/ReactiveCocoa,smilypeda/ReactiveCocoa,esttorhe/ReactiveCocoa,libiao88/ReactiveCocoa,howandhao/ReactiveCocoa,takeshineshiro/ReactiveCocoa,tonyarnold/ReactiveCocoa,sdhzwm/ReactiveCocoa,natestedman/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,windgo/ReactiveCocoa,Khan/ReactiveCocoa,esttorhe/ReactiveCocoa,wpstarnice/ReactiveCocoa,bensonday/ReactiveCocoa,AndyZhaoHe/ReactiveCocoa,buildo/ReactiveCocoa,longv2go/ReactiveCocoa,JackLian/ReactiveCocoa,ioshger0125/ReactiveCocoa,kiurentu/ReactiveCocoa,hilllinux/ReactiveCocoa,chao95957/ReactiveCocoa,Ray0218/ReactiveCocoa,tzongw/ReactiveCocoa,vincentiss/ReactiveCocoa,brasbug/ReactiveCocoa,fanghao085/ReactiveCocoa,BrooksWon/ReactiveCocoa,loupman/ReactiveCocoa,juliangrosshauser/ReactiveCocoa,kevin-zqw/ReactiveCocoa,j364960953/ReactiveCocoa,windgo/ReactiveCocoa,yizzuide/ReactiveCocoa,almassapargali/ReactiveCocoa,xiaoliyang/ReactiveCocoa,smilypeda/ReactiveCocoa,yizzuide/ReactiveCocoa,bscarano/ReactiveCocoa,yonekawa/ReactiveCocoa,OnTheWay1988/ReactiveCocoa,yytong/ReactiveCocoa,Khan/ReactiveCocoa,chieryw/ReactiveCocoa,emodeqidao/ReactiveCocoa,KuPai32G/ReactiveCocoa,PSPDFKit-labs/ReactiveCocoa,yangyangluoluo/ReactiveCocoa,yaoxiaoyong/ReactiveCocoa,andersio/ReactiveCocoa,cstars135/ReactiveCocoa,itschaitanya/ReactiveCocoa,goodheart/ReactiveCocoa,ddc391565320/ReactiveCocoa,shuxiashusheng/ReactiveCocoa,imkerberos/ReactiveCocoa,walkingsmarts/ReactiveCocoa,dskatz22/ReactiveCocoa,nickcheng/ReactiveCocoa,jeelun/ReactiveCocoa,ShawnLeee/ReactiveCocoa,zhigang1992/ReactiveCocoa,KJin99/ReactiveCocoa,zhukaixy/ReactiveCocoa,tiger8888/ReactiveCocoa,hbucius/ReactiveCocoa,Eveian/ReactiveCocoa,jeelun/ReactiveCocoa,loupman/ReactiveCocoa,cnbin/ReactiveCocoa,windgo/ReactiveCocoa,xulibao/ReactiveCocoa,dachaoisme/ReactiveCocoa,beni55/ReactiveCocoa,hj3938/ReactiveCocoa,brasbug/ReactiveCocoa,buildo/ReactiveCocoa,mtxs007/ReactiveCocoa,libiao88/ReactiveCocoa,beni55/ReactiveCocoa,xumaolin/ReactiveCocoa,BrooksWon/ReactiveCocoa,leichunfeng/ReactiveCocoa,msdgwzhy6/ReactiveCocoa,takeshineshiro/ReactiveCocoa,chieryw/ReactiveCocoa,mattpetters/ReactiveCocoa,bensonday/ReactiveCocoa,nikita-leonov/ReactiveCocoa,longv2go/ReactiveCocoa,isghe/ReactiveCocoa,yangshengchaoios/ReactiveCocoa,yonekawa/ReactiveCocoa,xiaobing2007/ReactiveCocoa,huiping192/ReactiveCocoa,Farteen/ReactiveCocoa,tonyarnold/ReactiveCocoa,yizzuide/ReactiveCocoa,taylormoonxu/ReactiveCocoa,Pingco/ReactiveCocoa,dz1111/ReactiveCocoa,monkeydbobo/ReactiveCocoa,zhigang1992/ReactiveCocoa,zxq3220122/ReactiveCocoa,sujeking/ReactiveCocoa,yytong/ReactiveCocoa,icepy/ReactiveCocoa,towik/ReactiveCocoa,esttorhe/ReactiveCocoa,rpowelll/ReactiveCocoa,ztchena/ReactiveCocoa,howandhao/ReactiveCocoa,KJin99/ReactiveCocoa,dachaoisme/ReactiveCocoa,ShawnLeee/ReactiveCocoa,ioshger0125/ReactiveCocoa,jackywpy/ReactiveCocoa,Ricowere/ReactiveCocoa,dskatz22/ReactiveCocoa,kevin-zqw/ReactiveCocoa,JackLian/ReactiveCocoa,Ricowere/ReactiveCocoa,jam891/ReactiveCocoa,200895045/ReactiveCocoa,yoichitgy/ReactiveCocoa,BrooksWon/ReactiveCocoa,pzw224/ReactiveCocoa,fanghao085/ReactiveCocoa,OneSmallTree/ReactiveCocoa,emodeqidao/ReactiveCocoa,zhaoguohui/ReactiveCocoa,200895045/ReactiveCocoa,hilllinux/ReactiveCocoa,brasbug/ReactiveCocoa,ReactiveCocoa/ReactiveSwift,OnTheWay1988/ReactiveCocoa,yonekawa/ReactiveCocoa,ztchena/ReactiveCocoa