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Objective-Cでの三項演算子

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#三項演算子ブーム
iOSを書いていると三項演算子ブームがやってきませんでしょうか?

変数に入れたい値がnilだったら代わりのテキストを入れるというものです。

Objective-Cだとこう書きます。

NSString *str = nil;
NSString *string = str ? str: @"nilだったので代入";

変数が複雑になるとちょっと書きづらいですが、基本的な構造は一緒なので落ち着いて書きましょう。

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