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前言 滿打滿算的話，從事iOS開發(fā)已經(jīng)快有兩年了。工作到現(xiàn)在，從未寫過什么技術(shù)文章發(fā)表在網(wǎng)絡(luò)上，一方面是技術(shù)不到家，另一方面則是語文不好（上學(xué)的...
反身代詞（某人自己） myself yourself herself himself itself yourselves ourselves t...
形容詞性物主代詞： This is my book. We love our motherload Those are your socks(襪...
主格代詞 I am a teacher. He is a teacher. You are teachers. 賓格代詞 He likes me...
Be動詞的否定 The man isn't back I am not back. They aren't back. He wasn't ba...
Be 動詞的形式 be, is ,am, are, was, were, being been The man is back They are...
基本句式一：S V (主謂) 基本句式二：S V P (主系表) 基本句式三：SVO （主謂賓） 基本句式四：SVoO （主謂間接賓語直接賓語）...
1.map和flatmap可以對數(shù)組中的每一個元素進(jìn)行操作。2.flatmap可以過濾掉nil。3.flatmap可以對數(shù)組進(jìn)行降維。
實習(xí)了快半年了，前天遇到了一個文字，我將另外一個數(shù)組賦值給某個數(shù)組?？梢栽趺炊紴榭??？墒谴蛏蠑帱c卻有數(shù)據(jù)。經(jīng)過指導(dǎo)才發(fā)現(xiàn)原來是數(shù)組沒有初始化。我...