shell用空格字符隔开参数。
用单个空格字符替换多个空格字符。
Replace multiple whitespace characters with single whitespace characters.
理由很简单：空格字符只有一种解释方式。
The reason is simple: a space character is always interpreted the same way.
使用诸如32等十进制值来指定空格字符。
标准字符，例如空格字符
空格字符的助记符，即
最常见的就是数据集合不使用空格字符分隔数据点。
Having data sets with a non-white space character separating the data points is a very common occurrence.
使用诸如0x20等十六进制符号来指定空格字符。
Hexadecimal notation such as 0x20to specify a space character.
任何空格字符都应该避免使用向前的斜线(\)字符。
Any space characters should be escaped using the forward slash (\) character.
您已经看到过匹配所有空格字符的元字符，例如 \s。
You've seen metacharacters, such as \s, that match any whitespace characters.
通过发送一空格字符来中断电话、电传机或数据传输。
To interrupt the telephone, teletype or data transmitting through sending a space character.
对于字符串，填充的是空格字符；对于位串，填充的是零。
For character strings, padding is with blanks; for bit strings, it is with zeros.
使用诸如' '或 " " 等引号括起的标准字符来指定空格字符。
Standard characters in quotes such as ' ' or " " to specify a space character.
内部foreach循环迭代哈希条目，删除值最后的后缀空格字符。
The inner foreach loop iterates over the hash entries and strips trailing space characters from the values.
有一件事比较麻烦，那就是匹配\ \2——它看上去就是一个空格字符。
One little thing that is a bit subtle is that we bother to match \ \ 2 — which looking above is just a whitespace character.
这使print语句打印字符值时后面跟着空格字符，而不是换行字符。
This makes the print statement print out the character value, followed by a space character instead of a newline character.
如果容器名称中在数据库分区表达式后面没有空格字符，则认为剩下的字符串是表达式的一部分。
If there is no space character in the container name after the database partition expression, it is assumed that the rest of the string is part of the expression.
仔细研究二者的差别，尤其要注意加引号的形式和包含空白(如空格字符和换行符)的参数。
Study the differences carefully, particularly for the quoted forms and the parameters that include white space such as blanks or newline characters.
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.
在所示的示例中，在每行(最后一行除外)的末尾处有空格字符，最后三行的每一行开头有一个空格字符。
In the sample shown, there is a space character at the end of each line (except the last one), and one at the beginning of each of the last three lines.
数据库分区表达式以一个空格字符结束；数据库分区表达式计算完毕后，空格后的内容附在容器名称的后面。
Terminate the database partition expression with a space character; whatever follows the space is appended to the container name after the database partition expression is evaluated.
第二个子表达式 (\s)只表示“查找与任何空格字符匹配的字符串，让我们回过来看什么与之匹配”。
The second subexpression, (\s), just means "match any whitespace character and let us refer back to what was matched.
通常IFS变量应该有一个空格、一个制表符和一个新行的值 --这些字符都会被作为一个空格字符来处理。
Normally the IFS variable would have the value of a space, a tab, and a newline -- any of those characters would be treated like a space character.
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).
最后一组的字符集是例外字符集。它是由所有的ASCII控制字符组成，包含空格字符以及下列字符（称为分隔符）
The last set of characters is the excluded set. It is made up of all ASCII control characters, the space character as well the following characters (known as delimiters)
所有所谓的控制字符(那些16进制值低于0x20的字符，空格字符)可能会导致您的解析器因为一个无效的标记错误而停止工作。
Any of the so-called control characters (those with a hex value below 0x20, the space character) can cause your parser to stop with an invalid token error.
例如，如果email地址为空，或者只包含空格字符，那么在对表单进行验证时就会显示“Enteryour email”消息。
For example, if email address is null or only contains Spaces, the message "Enter your email" will be shown when the form is validated.
由于空格字符被用来分隔集合中的元素，因此icecream元素(这里没有使用icecream)需要在名字两边使用双引号括起来。
Because the space character separates the elements of a set, the ice cream element needs double quotes around the name (instead of the less attractive icecream, for example).
由于空格字符被用来分隔集合中的元素，因此icecream元素(这里没有使用icecream)需要在名字两边使用双引号括起来。
Because the space character separates the elements of a set, the ice cream element needs double quotes around the name (instead of the less attractive icecream, for example).
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