dayflower https://blog.hatena.ne.jp/dayflower/ daily dayflower https://dayflower.hatenablog.com/ perl Boolean, string and numeric conversion 'bool', '""', '0+', If one or two of these operations are not overloaded, the remaining ones can be used instead. bool is used in the flow control operators (like while) and for the ternary ?: operation. These functions can return any arbitrary Perl value. If t… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fdayflower.hatenablog.com%2Fentry%2F20060925%2F1159175436" title=" bool の overload - daily dayflower" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2006-09-25 18:10:36 rich https://dayflower.hatenablog.com/entry/20060925/1159175436 1.0 100%