Simple optimization for _.extend
Simple optimization for _.extend

falqas/underscore,jashkenas/underscore,SerenoShen/underscore,Gimcrack/underscore,ligson/underscore,JonAbrams/underscore,zabefloyd/underscore,ijidan/underscore,mairasala/underscore,eaglesjava/underscore,keepgoingwm/underscore,nickkneafsey/underscore,documentcloud/underscore,thiswildorchid/underscore,ThiagoGarciaAlves/underscore,kuychaco/underscore,cgvarela/underscore,Tim-Zhang/underscore,falqas/underscore,sdwang/underscore,greyhwndz/underscore,ereddate/underscore,PUSEN/underscore,Forever8/underscore,liminghui/underscore,JoaquinSiabra/underscore,cintiamh/underscore,youprofit/underscore,platinumazure/underscore,kwangkim/underscore,rlugojr/underscore,cnwhy/underscore,mairasala/underscore,dxuehu/underscore,xiaoqiang730730/underscore,jonot/underscore,kairyan/underscore,cailong1028/underscore,lqjack/underscore,ryanwholey/underscore,SerenoShen/underscore,xiaoqiang730730/underscore,dfurtado/underscore,ElseZhang/underscore,platinumazure/underscore,Joanna913/underscore,paulfalgout/underscore,oss6/underscore,ereddate/underscore,lis186/underscore,vinodbonala/underscore,janocat/underscore,gougouGet/underscore,jolthoff/underscore,veg/underscore,cnwhy/underscore,thisismygithub/underscore,nickkneafsey/underscore,lqjack/underscore,singhsterabhi/underscore,braddunbar/underscore,wxmfront/underscore,jonot/underscore,Joanna913/underscore,jordanwink201/underscore,liyandalmllml/underscore,greyhwndz/underscore,jridgewell/underscore,vincent1988/underscore,irr/underscore,lucasfanning/underscore,jiankers/underscore,oss6/underscore,veg/underscore,colemakdvorak/underscore,RepmujNetsik/underscore,ijidan/underscore,elancom/underscore,jdelbello/underscore,Feiyang1/underscore,akre54/underscore,yekg880809/underscore,huzion/underscore,dfurtado/underscore,jiankers/underscore,ElseZhang/underscore,vinodbonala/underscore,roychen-7/underscore,lis186/underscore,jridgewell/underscore,premkumargithub/underscore,keepgoingwm/underscore,cintiamh/underscore,wjb12/underscore,ThiagoGarciaAlves/underscore,yuhualingfeng/underscore,liminghui/underscore,natac13/underscore,jpalomar/underscore,imsingh/underscore,PUSEN/underscore,craigmichaelmartin/underscore,debutt/underscore,mdboop/underscore,polandeme/underscore,janocat/underscore,sdwang/underscore,JoaquinSiabra/underscore,Yangani/underscore,WangRex/underscore,dkusch/underscore,dyx/underscore,cgvarela/underscore,zhangguangyong/underscore,tnga/underscore-es,snackshen/underscore,aziz-boudi4/underscore,huangnan1/2016gitStudy,ryanwholey/underscore,vincent1988/underscore,mdboop/underscore,AaronNGray/underscore-server,imsingh/underscore,mjhasbach/underscore,kuychaco/underscore,yuhualingfeng/underscore,huzion/underscore,Tim-Zhang/underscore,jpalomar/underscore,Gimcrack/underscore,jdelbello/underscore,emiel187/underscore,ligson/underscore,AaronNGray/underscore-server,JonAbrams/underscore,dkusch/underscore,craigmichaelmartin/underscore,lucasfanning/underscore,SeriaWei/underscore,youprofit/underscore,elancom/underscore,jianganglu/underscore,beenlee/underscore,mitar/underscore,premkumargithub/underscore,jolthoff/underscore,prosenjit-itobuz/underscore,Forever8/underscore,beenlee/underscore,snackshen/underscore,SeriaWei/underscore,akre54/underscore,strongconjunctions/underscore,dxuehu/underscore,prosenjit-itobuz/underscore,jashkenas/underscore,rlugojr/underscore,polandeme/underscore,eaglesjava/underscore,dyx/underscore,roychen-7/underscore,kairyan/underscore,irr/underscore,thisismygithub/underscore,wjb12/underscore,huangnan1/2016gitStudy,kwangkim/underscore,bkillenit/underscore,bkillenit/underscore,zabefloyd/underscore,Yangani/underscore,thiswildorchid/underscore,documentcloud/underscore,gougouGet/underscore,zhangguangyong/underscore,yekg880809/underscore,tnga/underscore-es,liyandalmllml/underscore,WangRex/underscore,aziz-boudi4/underscore,PengShi-sp/underscore,jfarid27/underscore,natac13/underscore,strongconjunctions/underscore,mitar/underscore,debutt/underscore,PengShi-sp/underscore,jordanwink201/underscore,mjhasbach/underscore,megawac/underscore,jianganglu/underscore,RepmujNetsik/underscore,Feiyang1/underscore,dimitriwalters/underscore,colemakdvorak/underscore,jfarid27/underscore,emiel187/underscore,singhsterabhi/underscore,wxmfront/underscore