我是Ruby的新手，我想对字符串进行排序，但保留非字母数字字符。
例如：render() {
let video = require('../videos/HISTORISCHETUIN.mp4');
return (
<View>
<TouchableHighlight onPress={console.log("Test")}>
<View>
<Video source={video} // Can be a URL or a local file.
ref={ref => this.player = ref} // Store reference
rate={1.0} // 0 is paused, 1 is normal.
volume={1.0} // 0 is muted, 1 is normal.
muted={false} // Mutes the audio entirely.
paused={true} // Pauses playback entirely.
resizeMode="stretch" // Fill the whole screen at aspect ratio.
repeat={true} // Repeat forever.
playInBackground={false} // Audio continues to play when app entering background.
playWhenInactive={false} // [iOS] Video continues to play when control or notification center are shown.
progressUpdateInterval={250.0} // [iOS] Interval to fire onProgress (default to ~250ms)
onLoadStart={this.loadStart} // Callback when video starts to load
onLoad={() => {
this.player.seek(30);
}} // Callback when video loads
onProgress={this.setTime} // Callback every ~250ms with currentTime
onEnd={console.log("Test")} // Callback when playback finishes
onError={this.videoError} // Callback when video cannot be loaded
style={styles.video} />
</View>
</TouchableHighlight>
</View>
)
我尝试过：
console.log()但我无法弄清楚如何将非字母数字字符放回去。
答案 0 :(得分：2)
这是对问题的回答：＆＃34; ...我想对字符串进行排序，但保留非字母数字字符。＆＃34;直到我更仔细地阅读你的例子，我才意识到这不是你想要的。我会留下我的答案，因为它确实回答了陈述的问题。
<强>代码
def sort_alphas(str)
alphas, non_alphas = str.each_char.with_index.partition { |c,_| c =~ /[[:alpha:]]/ }
chrs, offsets = alphas.transpose
chrs.sort.zip(offsets).concat(non_alphas).sort_by(&:last).map(&:first).join
end
示例
str = "hello, sally! seen 10/dec/2016"
sort_alphas(str)
#=> "acdee, eehll! llno 10/ssy/2016"
<强>解释
示例字符串的步骤如下。
alphas, non_alphas = str.each_char.with_index.partition { |c,_|
c =~ /[[:alpha:]]/ }
alphas
#=> [["h", 0], ["e", 1], ["l", 2], ["l", 3], ["o", 4], ["s", 7], ["a", 8],
# ["l", 9], ["l", 10], ["y", 11], ["s", 14], ["e", 15], ["e", 16],
# ["n", 17], ["d", 22], ["e", 23], ["c", 24]]
non_alphas
#=> [[",", 5], [" ", 6], ["!", 12], [" ", 13], [" ", 18], ["1", 19], ["0", 20],
# ["/", 21], ["/", 25], ["2", 26], ["0", 27], ["1", 28], ["6", 29]]
chrs, offsets = alphas.transpose
chrs
#=> ["h", "e", "l", "l", "o", "s", "a", "l", "l", "y", "s", "e", "e", "n",
# "d", "e", "c"]
offsets
#=> [0, 1, 2, 3, 4, 7, 8, 9, 10, 11, 14, 15, 16, 17, 22, 23, 24]
sorted_alphas = chrs.sort.zip(offsets)
# => [["a", 0], ["c", 1], ["d", 2], ["e", 3], ["e", 4], ["e", 7], ["e", 8],
# ["h", 9], ["l", 10], ["l", 11], ["l", 14], ["l", 15], ["n", 16],
# ["o", 17], ["s", 22], ["s", 23], ["y", 24]]
sorted_arr = sorted_alphas.concat(non_alphas)
#=> [["a", 0], ["c", 1], ["d", 2], ["e", 3], ["e", 4], ["e", 7], ["e", 8],
# ["h", 9], ["l", 10], ["l", 11], ["l", 14], ["l", 15], ["n", 16], ["o", 17],
# ["s", 22], ["s", 23], ["y", 24], [",", 5], [" ", 6], ["!", 12], [" ", 13],
# [" ", 18], ["1", 19], ["0", 20], ["/", 21], ["/", 25], ["2", 26], ["0", 27],
# ["1", 28], ["6", 29]]
ordered_arr = sorted_arr.sort_by(&:last)
#=> [["a", 0], ["c", 1], ["d", 2], ["e", 3], ["e", 4], [",", 5], [" ", 6],
# ["e", 7], ["e", 8], ["h", 9], ["l", 10], ["l", 11], ["!", 12], [" ", 13],
# ["l", 14], ["l", 15], ["n", 16], ["o", 17], [" ", 18], ["1", 19], ["0", 20],
# ["/", 21], ["s", 22], ["s", 23], ["y", 24], ["/", 25], ["2", 26], ["0", 27],
# ["1", 28], ["6", 29]]
ordered_chrs = ordered_arr.map(&:first)
#=> ["a", "c", "d", "e", "e", ",", " ", "e", "e", "h", "l", "l", "!", " ", "l",
# "l", "n", "o", " ", "1", "0", "/", "s", "s", "y", "/", "2", "0", "1", "6"]
ordered_chrs.join
#=> "acdee, eehll! llno 10/ssy/2016"