g100pon #59 正規表現（基本編）

Regexp.groovy

// g100pon #59 正規表現（基本編）

def target = 'The rain in Spain stays mainly in the plain!'
def pattern = /\b\w*ain\b/ // '*ain'で終わる単語

// ========== パターン検索 ==========
// String.eachMatch
def eachMatch = ''
target.eachMatch(pattern) {match ->
	eachMatch += match + ' '
}
assert eachMatch == 'rain Spain plain '

// Matcher.each
def each = ''
(target =~ pattern).each {match ->
	each += match + ' '
}
assert each == 'rain Spain plain '

// ========== パターン置換 ==========
// String.replaceAll
def replaceAll = target.replaceAll(pattern) {
	// 全ての単語の'ain'を'___'に置換
	it-'ain'+'___'
}
assert replaceAll == 'The r___ in Sp___ stays mainly in the pl___!'

// ========== 分類 ==========
// switchで正規表現を使う
switch('bear') {
	case ~/..../ : break // 単語が4文字の場合
	default : assert false
}

// grepで正規表現を使う
def beasts = ['bear', 'wolf', 'hogee', 'fug']
def grep = beasts.grep(~/..../)
assert grep == ['bear', 'wolf']