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How to implement a unique index on two columns in rails
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186
add_index :subscriptions, [:user_id, :content_id], unique: true
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What is the difference between os.path.basename() and os.path.dirname()?
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edited Mar 8 '14 at 16:41
Dan D.
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What is the difference between JavaConverters and JavaConversions in Scala?
...urn the appropriate wrappers discussed above. It is newer (since version 2.8.1) than JavaConversions (since 2.8) and makes the conversion between Scala and Java collection explicit. Contrary to what David writes in his answer, I'd recommend you make it a habit to use JavaConverters as you'll be much...
Find directory name with wildcard or similar to “like”
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find supports wildcard matches, just add a *:
find / -type d -name "ora10*"
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Append column to pandas dataframe
...t of NaNs rows.
– Israel Varea
Jun 18 '19 at 10:21
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show 2 more comments
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What is “incremental linking”?
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edited Jul 28 '10 at 3:16
answered Jul 28 '10 at 2:52
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Clearing coverage highlighting in Eclipse
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answered May 25 '11 at 8:12
KaiKai
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Rails Model find where not equal
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Rails 4
GroupUser.where.not(user_id: me)
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The application was unable to start correctly (0xc000007b)
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answered May 8 '12 at 5:38
moxmox
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How to immediately see compile errors in project tree of IntelliJ Idea?
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edited May 1 '18 at 7:47
Steve Chambers
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