The test was the third in the series to evaluate the alternate materials for possible use in the nozzle and motor insulation and built upon prior tests at Marshall in 20. The more powerful solid rocket motor will give the SLS rocket the capability to send even heavier payloads to the Moon and other areas of deep space for future Artemis missions. The test, conducted in Marshall’s East Test Area, produced more than 82,000 pounds of thrust and was part of an ongoing series of developmental tests for an upgraded booster design for future configurations of NASA’s SLS (Space Launch System) rocket.īeginning with Artemis IX, the SLS rocket in its Block 2 configuration will use the BOLE (booster obsolescence and life extension) booster. 14.Įngineers at NASA’s Marshall Space Flight Center in Huntsville, Alabama, conducted a hot fire of a 24-inch subscale solid rocket motor Sept. Use (?i) and (?-i) to control the case sensitivity of matching.Engineers at NASA’s Marshall Space Flight Center in Huntsville, Alabama, conducted a hot fire of a 24-inch subscale solid rocket motor Sept. If the modifier is contained within a subexpression, it affects only that subexpression. ![]() Modifiers allow changes to the matching behavior from that point on. b(.)\1n will match "been" and "boon", but not "bean", "ben" or "beeen". "abc5", "679abc" and "abc77abc").Įach sequence of characters which is matched within a "()" will be saved as a subexpression, which you can refer to later with \1 to \9, which refer to the subexpressions from left to right. (abc|)* will match any combination of "abc" and the digits 0 to 9 (e.g. (bey) will match between 4 and 5 instances of "bey". Parenthesis "()" can also be used to group characters for use with iterators and backreferences (discussed below). Matches at least n but no more than m times Note: \A and \Z match the start and end of text respectively, but since Beyond Compare performs the search on a line by line basis, these have the same effect as ^ and $. The following metacharacters control where the match can occur on a line. bey|beyond will match on bey, even if the string is "beyond". Alternatives can be placed within parenthesis "()" to make it obvious what is being matched against, as in a(bc|de)f. "|" groups characters from pattern delimiter ("(", "[", or the start of the pattern) to itself and then again to the end of the pattern. ab|cd will match "ab" or "cd", but not "ac". matches on any character that isn't a lowercase alphabetic character.īy placing an "|" between two groups of items, alternative matches can be represented. If the first character within the brackets is a caret "^", then the class represents everything except the specified characters. To include a "-" as part of the class, place it at the beginning or end of the string. Thus would represent all lowercase letters, and would represent both lower and uppercase letters. The predefined classes (except ".") can be used in the brackets, and if a dash "-" appears between two characters, it represents a range. You can also construct your own character classes by surrounding a group of characters in brackets "". There are multiple types of metacharacters, each detailed below. To match against a metacharacter, escape it, by prefixing it with a backslash "\". Normal characters always match against only themselves. When performing a match, metacharacters take on special meanings, controlling how the match is made and serving as wildcards. Another excellent resource is Steve Mansour's A Tao of Regular Expressions, a copy of which can be found at:Ī regular expression is composed of two types of characters: normal characters and metacharacters. ![]() One such resource is a book called Mastering Regular Expressions. While Regular Expressions can be a complex topic, there are several excellent resources about them. ![]() The regular expression support in Beyond Compare is a subset of the Perl Compatible Regular Expression (PCRE) syntax. Beyond Compare allows you to use regular expressions when searching through text, and when specifying rules for classifying text. Regular Expressions are a powerful way to define patterns for searching and matching.
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