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inkscape linux svg

  1. Open Inkscape.
  2. Choose "File - Import" to import a bitmap file.
  3. Choose to "embed" the image.
  4. Select the image with the select tool ().
  5. Select Path - Trace Bitmap... for settings (below shown for 2 colors = "Scans"):
    enter image description here
  6. Select "Update" for a preview until settings are fine.
  7. Start tracing with "OK".

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go url encoding

func  QueryUnescape func QueryUnescape (s string ) ( string , error ) QueryUnescape does the inverse transformation of QueryEscape, converting %AB into the byte 0xAB and '+' into ' ' (space). It returns an error if any % is not followed by two hexadecimal digits. func  QueryUnescape func QueryUnescape (s string ) ( string , error ) QueryUnescape does the inverse transformation of QueryEscape, converting %AB into the byte 0xAB and '+' into ' ' (space). It returns an error if any % is not followed by two hexadecimal digits.

mongo db mongodb search index engine

创建全文索引 考虑以下 posts 集合的文档数据,包含了文章内容(post_text)及标签(tags): { "post_text" : "enjoy the mongodb articles on Runoob" , "tags" : [ "mongodb" , "runoob" ] } 我们可以对 post_text 字段建立全文索引,这样我们可以搜索文章内的内容: > db . posts . ensureIndex ({ post_text : "text" }) 使用全文索引 现在我们已经对 post_text 建立了全文索引,我们可以搜索文章中的关键词 runoob: > db . posts . find ({ $text :{ $search : "runoob" }})