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Postgres: How to do Composite keys?
I cannot understand the syntax error in creating a composite key. It may be a logic error, because I have tested many varieties.
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Remove an Existing File from a Git Repo
...velopment log (log/development.log) in our repositories. Is this possible and how can I do it?
3 Answers
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How to convert the ^M linebreak to 'normal' linebreak in a file opened in vim?
... Solution's response didn't work for me, only @MateenUlhaq commands helped me.
– Edenshaw
Jul 26 '18 at 17:05
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How could I convert data from string to long in c#
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This answer no longer works, and I cannot come up with anything better then the other answers (see below) listed here. Please review and up-vote them.
Convert.ToInt64("1100.25")
Method signature from MSDN:
public static long ToInt64(
string value
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Warning message: In `…` : invalid factor level, NA generated
I don't understand why I got this warning message.
5 Answers
5
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How to get the unix timestamp in C#
I have had look around stackoverflow, and even looked at some of the suggested questions and none seem to answer, how do you get a unix timestamp in C#?
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Can you get DB username, pw, database name in Rails?
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From within rails you can create a configuration object and obtain the necessary information from it:
config = Rails.configuration.database_configuration
host = config[Rails.env]["host"]
database = config[Rails.env]["database"]
username = config[Rails.env]["username"]
passw...
Fluent Validation vs. Data Annotations [closed]
...ata Annotations
It has excellent client side validation support for most standard validation rules
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How to log SQL statements in Grails
...ssible. I want this as well as it's annoying for debugging certain classes and not wanting to see other queries as well.
– Guus
Oct 23 '15 at 16:22
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Get list from pandas DataFrame column headers
I want to get a list of the column headers from a pandas DataFrame. The DataFrame will come from user input so I won't know how many columns there will be or what they will be called.
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