字符串长度和换行符 [英] string length and newlines
问题描述
我正在尝试为textarea执行客户端输入验证
确定字符数不超过某个
长度。目前，我只使用str.length，但如果textarea
包含换行符，则str.length是不准确的。如果我查看字符串，我会看到类似''123'\\ n '456'的内容，但是当它被传递回
服务器时，''\ n''将被更改为''\\\\ n''，而长度为7
的字符现在的长度为8.是解决此问题的最佳方法。 />
在字符串中搜索换行符并在长度计数上加1或者
有更简单的方法吗？
感谢您的帮助，
Rob
I am trying to perform client-side input validation for a textarea to
determine that the number of characters doesn''t exceed a certain
length. Currently, I am just using str.length, but if the textarea
contains newlines, str.length is inaccurate. If I view the string, I
will see something like ''123\n456'', but when this gets passed back to
the server, ''\n'' will be changed to ''\r\n'' and what had a length of 7
characters now has a length of 8. Is the best way to approach this to
search the string for newlines and add 1 to the length count or is
there a simpler way?
Thanks for your help,
Rob
推荐答案
1月10日，8：38 * am，Rob< rdenn ... @ triactive。 comwrote：
On Jan 10, 8:38*am, Rob <rdenn...@triactive.comwrote:
我正在尝试为textarea执行客户端输入验证
确定字符数不对超过一定长度的b $ b。 *目前，我只使用str.length，但如果textarea
包含换行符，则str.length是不准确的。 *如果我查看字符串，我会看到类似''123'\\ n '456'的内容，但是当它被传回
服务器时，''\\ \\ n''将更改为''\\\\ n''，而长度为7
的字符现在的长度为8. *这是解决此问题的最佳方法
在字符串中搜索换行符并在长度计数上加1或者
有更简单的方法吗？
感谢您的支持帮助，
Rob
I am trying to perform client-side input validation for a textarea to
determine that the number of characters doesn''t exceed a certain
length. *Currently, I am just using str.length, but if the textarea
contains newlines, str.length is inaccurate. *If I view the string, I
will see something like ''123\n456'', but when this gets passed back to
the server, ''\n'' will be changed to ''\r\n'' and what had a length of 7
characters now has a length of 8. *Is the best way to approach this to
search the string for newlines and add 1 to the length count or is
there a simpler way?
Thanks for your help,
Rob
我能想到的最紧凑的代码是：
var num_newlines = some_string.split（" \ n"）。length - 1;
var augmented_length = some_string.length + num_newlines;
-Joey
The most compact code I can think of would be:
var num_newlines = some_string.split("\n").length - 1;
var augmented_length = some_string.length + num_newlines;
-Joey
2008年1月10日上午11:47， jh *** ***@gmail.com 写道：
On 1/10/2008 11:47 AM, jh******@gmail.com wrote:
1月10日上午8:38，Rob< rdenn ... @ triactive.comwrote：
On Jan 10, 8:38 am, Rob <rdenn...@triactive.comwrote:
>我正在尝试对textarea执行客户端输入验证，以确定字符数不超过某个
长度。目前，我只使用str.length，但如果textarea
包含换行符，则str.length是不准确的。如果我查看字符串，我会看到类似''123'\\ n '456'的内容，但是当它被传回服务器时，''\ n''将被更改为' '\\ n'和7长度的字符现在长度为8.是解决此问题的最佳方法
在字符串中搜索换行符并将1添加到长度计算还是
有一个更简单的方法吗？
感谢您的帮助，
Rob
>I am trying to perform client-side input validation for a textarea to
determine that the number of characters doesn''t exceed a certain
length. Currently, I am just using str.length, but if the textarea
contains newlines, str.length is inaccurate. If I view the string, I
will see something like ''123\n456'', but when this gets passed back to
the server, ''\n'' will be changed to ''\r\n'' and what had a length of 7
characters now has a length of 8. Is the best way to approach this to
search the string for newlines and add 1 to the length count or is
there a simpler way?
Thanks for your help,
Rob
最紧凑我能想到的代码是：
var num_newlines = some_string.split（" \ n"）。length - 1;
var augmented_length = some_string.length + num_newlines;
-Joey
The most compact code I can think of would be:
var num_newlines = some_string.split("\n").length - 1;
var augmented_length = some_string.length + num_newlines;
-Joey
some_string.replace（/ \ n / g /，'' ''）;
将用一个空格替换字符串中的换行符
-
anthony在我的宠物程序员点com
some_string.replace(/\n/g/, '' '');
will replace the newlines in the string with a single space
--
anthony at my pet programmer dot com
在comp.lang.javascript消息< fm **** ******@registered.motzarella.org>
，星期四，2008年1月10日12:26:44，Anthony Levensalor
< ki **** **@mypetprogrammer.composted：
In comp.lang.javascript message <fm**********@registered.motzarella.org>
, Thu, 10 Jan 2008 12:26:44, Anthony Levensalor
<ki******@mypetprogrammer.composted:
> On 1/10/2008 11:47 AM， jh ****** @ gmail.com 写道：
> 1月10日上午8:38， Rob< rdenn ... @ triactive.comwrote：
>On Jan 10, 8:38 am, Rob <rdenn...@triactive.comwrote:
>>我正在尝试为textarea执行客户端输入验证
确定字符数不超过某个长度。目前，我只使用str.length，但如果textarea
包含换行符，则str.length是不准确的。如果我查看字符串，我会看到类似''123'\\ n '456'的内容，但是当它被传回服务器时，''\ n''将被更改为' '\\ n'和7长度的字符现在长度为8.是解决此问题的最佳方法
在字符串中搜索换行符并将1添加到长度计数还是
有一个更简单的方法？
感谢您的帮助，
Rob
>>I am trying to perform client-side input validation for a textarea to
determine that the number of characters doesn''t exceed a certain
length. Currently, I am just using str.length, but if the textarea
contains newlines, str.length is inaccurate. If I view the string, I
will see something like ''123\n456'', but when this gets passed back to
the server, ''\n'' will be changed to ''\r\n'' and what had a length of 7
characters now has a length of 8. Is the best way to approach this to
search the string for newlines and add 1 to the length count or is
there a simpler way?
Thanks for your help,
Rob
我能想到的最紧凑的代码将是：
var num_newlines = some_string.split（" \ n"）。length - 1;
var augmented_length = some_string.length + num_newlines;
The most compact code I can think of would be:
var num_newlines = some_string.split("\n").length - 1;
var augmented_length = some_string.length + num_newlines;
这需要为每一行创建一个Object，这可能是一点点
慢。
That requires creating an Object for each line, which could be a little
slow.
> some_string.replace（/ \ n / g /，''''）;
将用单个空格$替换字符串中的换行符b $ b
>some_string.replace(/\n/g/, '' '');
will replace the newlines in the string with a single space
如果第一次删除第一个斜杠。
如果行分隔总是包含与\ n的匹配，那么
X = some_string.replace（/ [^ \ n] / g，""）
应该给出新的数量线条，*可能*更快。未经测试。
-
（c）John Stockton，英国萨里。 ?@merlyn.demon.co.uk Turnpike v6.05 MIME。
Web< URL：http：//www.merlyn.demon.co.uk/- FAQish主题，首字母缩略词，&链接。
正确< = 4行签名。如上所述的分隔符，一行恰好是 - 。 （SonOfRFC1036）
不要给我发邮件。在回复之前，请引用>或或 （SonOfRFC1036）
If the third slash is first removed.
If the line separation always contains a match to \n, then
X = some_string.replace(/[^\n]/g, "")
should give a count of new lines, *possibly* quicker. Untested.
--
(c) John Stockton, Surrey, UK. ?@merlyn.demon.co.uk Turnpike v6.05 MIME.
Web <URL:http://www.merlyn.demon.co.uk/- FAQish topics, acronyms, & links.
Proper <= 4-line sig. separator as above, a line exactly "-- " (SonOfRFC1036)
Do not Mail News to me. Before a reply, quote with ">" or "" (SonOfRFC1036)
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