词汇：inject

vt. 注射；注入

相关场景

19. reduce方法折叠集合:

Enumerable模块的类，可对集合进行过滤，遍历和转化。map和select；还有个可以管理一切的方法 reduce(or inject), reduce可以转换结构；接受者，每个元素被调用一次，并产生返回值，累加器。 enum.reduce(0){|accumulator, element| accumulator + element} 0初始值；建议你总是使用一个带有起始值的累加器。 enum.reduce(0, :+);
数组转成Hash; array.reduce({}) {|hash, element| hash.update(element => true)}
users.select{|u| u.age>=21}.map(&:name) 获取大于等于21的names数组。比较低效；
User.reduce([]) {|names, user| names << user.name if user.age >=21 ; names}

>> Effective Ruby

Let her go, off into the sunset to inject another family with her poison!

>> 水性杨花 Easy Virtue Movie Script

Even inject them with poison when they were too feeble to do it for themselves.

>> 水性杨花 Easy Virtue Movie Script

Neil injects Kat in the arm. Her eyes close.

>> 信条Tenet Movie Script

THE BAT-MAN removes a syringe, labelled "stimulant", from his ammo belt and injects the needle into his biceps.

>> 蝙蝠侠：元年 Batman: Year One Movie Script

She injects Sofie with the gold syringe.

>> 杀死比尔Kill Bill Movie Script

He injects himself.

>> 老无所依No Country for Old Men Movie Script