代码使用子字符串过滤出这些文件。
长度参数指定了所需子字符串的长度。
The length argument specifies the length of the desired substring.
提取子字符串并操作字符串的多个部分。
清单9.shell参数值的子字符串。
中缀索引将匹配在字符串内任意位置的子字符串。
The infix index would match substrings anywhere within the string.
子字符串是输入字符串的零个或多个相邻字符串长度单元。
A substring is zero or more contiguous string length units of input string.
在图5中，已经指定字符串第一个字节的长度为1的子字符串。
In Figure 5, the substring of length 1 from the first byte of the string has been specified.
子序列中的字符与子字符串中的字符不同，它们不需要是连续的。
The characters in a subsequence, unlike those in a substring, do not need to be contiguous.
不久后的第六个赛季开了，生产商试图添加一个子字符的显示。
Shortly after the sixth season opened, the producers attempted to add a child character to the show.
它可以创建任意长度的单词前缀索引和可变长度的中缀子字符串的索引。
It can create indexes of word prefixes of arbitrary length and indexes of infix substrings of varying lengths.
好的，一个普通的任务是判断给定的子字符串是否能在该值中任意处找到。
Well, one very common task is determining whether or not a given substring can be found anywhere within that value.
对于这些情形，可添加一条异常规则，将部件指示器处理为令牌中的子字符串。
For such cases, an exception rule can be added for processing part indicators as substrings in tokens.
cut属性指出是否在继续之前从请求URL中删除匹配的子字符串片段。
The cut attribute indicates whether to delete the matched substring segment from the request URL before proceeding.
这种形式的字符串截断非常简便，只需用冒号分开来指定起始字符和子字符串长度。
This form of string chopping can come in quite handy; simply specify the character to start from and the length of the substring, all separated by colons.
“*”是通配符，可用来支持子字符串匹配，比如 com.infoq.*.*。
The * character is used to indicate wildcards, and can be used to support substring matching as in com.infoq.*.*.
如前所述，contains函数实现子字符串匹配，因此对于以上查询返回true。
As previously mentioned, the contains function implements sub-string matching and therefore returns the value true for the above query.
第一个参数是子字符串，第二个参数是搜索字符串，可选的起始位置可以提供作为第三个参数。
The first argument is the substring, the second argument is the search string, and an optional starting position can be supplied as a third argument.
当从原始的输入数据中提取字符串时，试着从原始字符串返回一个子字符串，而不是创建一份拷贝。
When extracting strings from a set of input data, try to return a substring of the original data, instead of creating a copy.
即使在这样一小段脚本中，您也可以找到一些参数扩展，包括长度、子字符串、模式匹配和模式替换。
You'll recognize several parameter expansions, including length, substring, pattern matching, and pattern replacement in even this short piece of script.
然后，split方法返回一个数组，其中保存了根据空格字符将给定字符串分割成子字符串的结果。
The split method then returns an array holding the strings that resulted from separating the given string into substrings, as delimited by the space character.
它查看与第一个例子相同的子字符串系列，但是bash从初始字符串除去最短的匹配，然后返回结果。
It checks the same set of substrings as our first example did, except that bash removes the shortest match from our original string, and returns the result.
使用文本索引使文档搜索的效率大大提高，因为不需要像进行子字符串匹配时那样在查询时检查文本数据。
Using a text index makes document search much more efficient, as the text data does not need to be examined at query time like it is done with sub-string matching.
toCollection方法以空格来分割字符串，然后返回一个包含这些子字符串的Array（数组）。
The toCollection method splits a string on spaces and returns an Array containing the substrings.
在第1部分的图13可以看到，cn属性类型有一个叫做SUBSTR的字段，它定义了子字符串匹配的匹配规则。
You saw in Part 1, Figure 13 that the cn attribute type has a field called substr, which defines the matching rules for substring match.
这类似于我们在正则表达式中使用“捕捉组”来提取我们需要的子字符串时来替代把一个字符串分隔成好几个的方法。
It is analogous to using "capture groups" in a regular expression to pull out substrings we want, instead of splitting the string in several successive steps to extract the substrings we want.
第二个for循环还显示了如何将string分割为子字符串的list(使用空格字符来指示子字符串的边界)。
The second for loop also shows how to split a string into a list of substrings (using the space character to indicate the boundaries of substrings).
感兴趣的类别可以是任何有效的Wikipedia类别(或者甚至某个Wikipedia类别的任何子字符串)。
The categories of interest can be any valid Wikipedia category (or even any substring of a Wikipedia category).
如果此目录包含超过两个压缩文件，或者超过一个包含子字符串_ Monitor _的Zip文件，则导出将以失败告终。
If this directory contains more than two zip files, or more than one zip file containing the substring _monitor_, the export will fail.
第二行的第一个重写条件表明：下面的规则仅适用于HTTP请求报头中的user - agent字符串包含子字符串msie的情形。
The second line, the first rewrite condition, indicates that following rules only apply when the user-agent string in the HTTP request header contains the substring MSIE.
LOCATE LOCATE ('beach '，p. d escription)返回一个子字符串在搜索字符串中第一次出现的起始位置，如果没找到子字符串，则返回0。
LOCATE LOCATE (' beach ', p.description) Returns the starting location for the first occurrence of a substring in a search string, or zero if the substring isn't found.
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