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Remove duplicate rows in MySQL
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A really easy way to do this is to add a UNIQUE index on the 3 columns. When you write the ALTER statement, include the IGNORE keyword. Like so:
ALTER IGNORE TABLE jobs
ADD UNIQUE INDEX idx_name (site_id, title, company);
This will drop all the duplicate rows. As an added benefit...
What is the most efficient way to store a list in the Django models?
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edited Feb 17 '17 at 13:19
Community♦
111 silver badge
answered Jul 10 '09 at 15:23
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How to Add Stacktrace or debug Option when Building Android Studio Project
...swered Feb 10 '14 at 10:19
pyus13pyus13
23.7k77 gold badges9292 silver badges107107 bronze badges
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Random record from MongoDB
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Starting with the 3.2 release of MongoDB, you can get N random docs from a collection using the $sample aggregation pipeline operator:
// Get one random document from the mycoll collection.
db.mycoll.aggregate([{ $sample: { size: 1 } }])
If...
How to make a display in a horizontal row
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133
List items are normally block elements. Turn them into inline elements via the display property...
How to check whether a string contains a substring in Ruby
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1394
You can use the include? method:
my_string = "abcdefg"
if my_string.include? "cde"
puts "S...
Running MSBuild fails to read SDKToolsPath
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answered Apr 29 '10 at 16:43
John HannJohn Hann
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How to saveHTML of DOMDocument without HTML wrapper?
... Alessandro VendruscoloAlessandro Vendruscolo
12.1k33 gold badges2929 silver badges3838 bronze badges
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Way to get all alphabetic chars in an array in PHP?
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edited Jan 11 '09 at 16:03
answered Jan 10 '09 at 23:05
PE...
How to read a large file - line by line?
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answered Nov 4 '11 at 13:46
KatrielKatriel
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