Documentation update on Template Where Function for nil - hugo - [fork] hugo port for 9front
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       ---
 (DIR) commit d313bc78a478f9457ce8b496ede0b231e6b4d0f1
 (DIR) parent 29c9a40a8d5defbe69c38e9997313ce27df55eaf
 (HTM) Author: Benny Wu <benzwu@gmail.com>
       Date:   Tue, 11 Aug 2015 09:33:13 +0700
       
       Documentation update on Template Where Function for nil
       
       Diffstat:
         M docs/content/templates/functions.md |      16 ++++++++++++++++
       
       1 file changed, 16 insertions(+), 0 deletions(-)
       ---
 (DIR) diff --git a/docs/content/templates/functions.md b/docs/content/templates/functions.md
       @@ -265,6 +265,22 @@ Following operators are now available
               {{ .Content }}
            {{ end }}
        
       +### Unset field
       +Filter only work for set fields. To check whether a field is set or exist, use operand `nil`.
       +
       +This can be useful to filter a small amount of pages from a large pool. Instead of set field on all pages, you can set field on required pages only.
       +
       +Only following operators are available for `nil`
       +
       +- `=`, `==`, `eq`: True if the given field is not set.
       +- `!=`, `<>`, `ne`: True if the given field is set.
       +
       +e.g.
       +
       +    {{ range where .Data.Pages ".Params.specialpost" "!=" nil }}
       +       {{ .Content }}
       +    {{ end }}
       +
        
        ## Math