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How to create index in Entity Framework 6.2 with code first
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Well 26.10.2017 Entity Framework 6.2 was officially released.
It includes a possibility to define indexes with ease via Fluent API. Ho it is to use was already announced in the beta of 6.2.
Now you can use the HasIndex() method, followed by IsUnique() if it should be an ...
PostgreSQL query to return results as a comma separated list
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use array_to_string() & array() function for the same.
select array_to_string(array(select column_name from table_name where id=5), ', ');
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Remove a symlink to a directory
I have a symlink to an important directory. I want to get rid of that symlink, while keeping the directory behind it.
9 A...
Random record from MongoDB
...elease 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 you want to select the random document(s) from a filtered subset of the collect...
How to view hierarchical package structure in Eclipse package explorer
..... / Hierarchical
The "View Menu" can be opened with Ctrl + F10, or the small arrow-down icon in the top-right corner of the Package Explorer.
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using statement with multiple variables [duplicate]
...}
Note that the IDE will also support this indentation, i.e. it intentionally won’t try to indent the second using statement.
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Why '&&' and not '&'?
Why is && preferable to & and || preferable to | ?
16 Answers
16
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Remove 'a' from legend when using aesthetics and geom_text
How can I can remove the letter 'a' from the legend generated by this code? If I remove the geom_text , then the 'a' letter will not show in the legend. I want to keep geom_text , though.
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Remove tracking branches no longer on remote
... the following in one line:
git branch --merged >/tmp/merged-branches && \
vi /tmp/merged-branches && xargs git branch -d </tmp/merged-branches
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What are file descriptors, explained in simple terms?
...quely represents an opened file within a process. File descriptor 0, for example, will represent one opened file in one process and a completely different opened file in another process.
– Keith Thompson
Jan 7 '16 at 22:04
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