// List of sentencesString[]sentences={"The sun is shining",//0"Apples are delicious",//1"The moon is bright",//2"Birds are singing"//3};// Start line anchor (^)StringbeginWithPattern="^The";//Matches lines 0 and 2// End line anchor ($)StringendWithPattern="ing$";//Matches...
//1"The moon is bright",//2"Birds are singing"//3};// Start line anchor (^)StringbeginWithPattern="^The";//Matches lines 0 and 2// End line anchor ($)StringendWithPattern="ing$";//Matches lines 0 and 3
但您尚未对字符串的其余部分执行任何操作。您似乎希望character class的repetition直到end of the string：...
那么可以使用negated character classes[^L]、alternation|和end of string anchor$。
*，那么可以使用negated character classes[^L]、alternation|和end of string anchor$。
但您尚未对字符串的其余部分执行任何操作。您似乎希望character class的repetition直到end of the string：...
width assertions, which makes it clear why I prefer "anchor". Anchors set limitations on where a match must take place. The two that we want are "^", which means "anchor to the beginning of the string" and "$", which means anchor to the end of the string. So, our pattern becomes...
Without this option, these anchors match at beginning or end of the string. For an example, see Multiline Match for Lines Starting with Specified Pattern. If the pattern contains no anchors or if the string value has no newline characters (e.g. \n), the m option has no effect. x "...
AnchorRegex SyntaxDescription startOfString ^ Match the start of the string (or the start of a line in multiline mode) endOfString $ Match the end of the string (or the end of a line in multiline mode) wordBoundary \b Match the start or end of a word without consuming characters See...
re.M(MULTILINE): Allows start of string (^) and end of string ($) anchor to match newlines as well. re.X(re.VERBOSE):允许在正则表达式中写whitespace和注释以提升表达式的可读性 statement ="Please contact us at: support@cnblogs.com, regex_helper@wclsn.com"# Using the VERBOSE flag helps ...