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Git command to display HEAD commit id?
What command can I use to print out the commit id of HEAD?
9 Answers
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What are database normal forms and can you give examples? [closed]
.... Recall that a primary key can be made up of multiple columns. As Chris said in his response:
The data depends on the key [1NF], the whole key [2NF] and nothing but the key [3NF] (so help me Codd).
2NF
Say you have a table containing courses that are taken in a certain semester, and you have the...
How to create a self-signed certificate with OpenSSL
...ommand. It can be tricky to create one that can be consumed by the largest selection of clients, like browsers and command line tools.
It's difficult because the browsers have their own set of requirements, and they are more restrictive than the IETF. The requirements used by browsers are documente...
How can I dynamically create a selector at runtime with Objective-C?
...at runtime. This can be done with the NSSelectorFromString function:
setWidthHeight = NSSelectorFromString(aBuffer);
Edit: Bummer, too slow. :P
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Equivalent of .try() for a hash to avoid “undefined method” errors on nil? [duplicate]
In Rails we can do the following in case a value doesn't exist to avoid an error:
12 Answers
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EntityType has no key defined error
...ifferent things can cause this error. In my case, I mistakenly marked my "Id" field "private" instead of "public" (a habit from Java/JPA). Larry Raymond's response below is arguably the "best" reply to this question. It lists most of the common scenarios behind "EntityType has no key defined erro...
How to check visibility of software keyboard in Android?
...ing - find out if the software keyboard is shown. Is this possible in Android?
42 Answers
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Selenium wait until document is ready
... not sure whether it quits the page loading after the exception thrown. i didn't try this code yet. Want to just try it.
This is an implicit wait. If you set this once it will have the scope until the Web Driver instance destroy.
See the documentation for WebDriver.Timeouts for more info.
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How to include layout inside layout?
How to include layout inside layout in Android?
6 Answers
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Get value of c# dynamic property via string
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this is what works with Expando Object: (((IDictionary<string, object>)x))["value1"]
– Michael Bahig
Sep 13 '15 at 17:50
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