created可以使用挂钩在创建实例后运行代码: newVue({data:{a:1},created:function(){//`this`pointstothevminstanceconsole.log('ais
type_index(typeid(i))]<<'\n';std::cout<<"dis"<<type_names[std::type_index(typeid(d))]<<'\n';std::cout<<"ais
:cout<<"iis"<<type_names[typeid(i)]<<'\n';std::cout<<"dis"<<type_names[typeid(d)]<<'\n';std::cout<<"ais
alnum";if(vec[n]&std::ctype_base::punct)std::cout<<"punct";std::cout<<'\n';}} 二次 产出: 二次 '0'isadigitU+7ais
0.1;//int64_tn=*(int64_t*)(&d);//strictaliasingviolationint64_tn;memcpy(&n,&d,sizeofd);//OKprintf("\n%ais
0.1;//int64_tn=*(int64_t*)(&d);//strictaliasingviolationint64_tn;memmove(&n,&d,sizeofd);//OKprintf("%ais
Thebuiltinunaryminusoperatorcalculatesthenegativeofitspromotedoperand.Forunsigneda,thevalueof-ais2b -
h={"a"=>100,"b"=>200}h.each{|key,value|puts"#{key}is#{value}"} produces: ais100bis200 staticVALUErb_hash_each_pair
yield(v))}endende=(-20..20).to_a*10000a=e.wsample(20000){|x|Math.exp(-(x/5.0)**2)#normaldistribution}#ais20000samplesfrome.pa.length