awk blength函数域length有什么区别呢？

力哥丶

  如题。。

waker

大多数版本不支持前者

力哥丶

回复 2# waker


    听说前者显示的是字节？后面内个是字符？

力哥丶

回复 2# waker


    另外在咨询一下， split 的用法 我这还是有点晕。


  split（变量？，数组？，“分隔符？”）

dn833

split(第几列，数组名，“分隔符”)

jason680

回复 4# 力哥丶

http://www.gnu.org/software/gawk/manual/gawk.html

http://www.gnu.org/software/gawk/manual/gawk.html#String-Functions
...
split(string, array [, fieldsep [, seps ] ])
Divide string into pieces separated by fieldsep and store the pieces in array and the separator strings in the seps array. The first piece is stored in array[1], the second piece in array[2], and so forth. The string value of the third argument, fieldsep, is a regexp describing where to split string (much as FS can be a regexp describing where to split input records; see Regexp Field Splitting). If fieldsep is omitted, the value of FS is used. split() returns the number of elements created. seps is a gawk extension with seps being the separator string between array and array[i+1]. If fieldsep is a single space then any leading whitespace goes into seps[0] and any trailing whitespace goes into seps[n] where n is the return value of split() (that is, the number of elements in array).

The split() function splits strings into pieces in a manner similar to the way input lines are split into fields. For example:

          split("cul-de-sac", a, "-", seps)

splits the string ‘cul-de-sac’ into three fields using ‘-’ as the separator. It sets the contents of the array a as follows:

          a[1] = "cul"
          a[2] = "de"
          a[3] = "sac"

and sets the contents of the array seps as follows:

          seps[1] = "-"
          seps[2] = "-"
   

力哥丶

感谢以上几位兄弟。