List columns with indexes in PostgreSQL
I would like to get the columns that an index is on in PostgreSQL. In MySQL you can use SHOW INDEXES FOR table and look at the Column_name column. mysql> show indexes from foos; +-------+------------+---------------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+ | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation
Edge NGram search in PostgreSQL
I need to make search-as-you-type autocomplete for a large list of companies (over 80,000,000). The company name should contain the word that starts with a search query like this +-------+----------------------------------+ | term | results | +-------+----------------------------------+ | gen | general motors; general electric | | geno | genoptix; genomic health | | genom | genoma group; genomic h
nodejs - How to add image data from file into canvas
I apologize if I'm wrong here, but it looks like you've found this code somewhere and tried to use it without actually understanding what's happening under the covers. Even if you were to fix the Image is not defined error, there are many others. I have the fixed code at the end of this post, but I'd recommend thinking more deeply about these issues in the code from your question: What is Image? W
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