Problems when inserting Golang data into a template

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Today in the template to execute a very simple statement, and then hit the wall, left to try to try the right, or through the Internet search to find a solution.

I want to execute or manipulate the logic in the template, i.e.: "If a | | b {do something} "; I have tried the following ways:

1To execute or manipulate logic in a template: that is:ifA | | D = Dosomething}2(Error 1) {{if. A | |. B}} 3         Dosomething4 {{end}}5(Error 2) {{if. A. B}}6         Dosomething7 {{end}}8(Error 3) {{if'. A. B '}}9         DosomethingTen {{end}} One ... A the right way to actually be: -{{ifor. A. B}}  -         Dosomething the{{End}}

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Resources:

1. Golang template Syntax Concise tutorial: http://www.cnblogs.com/Pynix/p/4154630.html