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Best way to simulate “group by” from bash?
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People looking for "group by" with string concatenation instead of number addition would replace arr[$1,$2]+=$3+$4 with e.g. arr[$1,$2]=(arr[$1,$2] $3 "," $4). I needed this to provide a grouped-by-package list of files (two columns only) and used: ar...
How to get an object's property's value by property name?
In PowerShell, how do you get an object's property value by specifying its name (a string)? I want something like the following:
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ViewParam vs @ManagedProperty(value = “#{param.id}”)
... if you want the view parameters to survive any validation failures caused by forms enclosed in the view, otherwise you need to manually retain all request parameters for the subsequent requests by <f:param> in the command components.
Example:
<f:metadata>
<f:viewParam id="user_...
What's an appropriate HTTP status code to return by a REST API service for a validation failure?
...e that HTTP 422 has not made it into HTTP 1.1, RFC-7231.
Richardson and Ruby's RESTful Web Services contains a very helpful appendix on when to use the various HTTP response codes. They say:
400 (“Bad Request”)
Importance: High.
This is the generic client-side error status, used when n...
difference between primary key and unique key
...first point, as it might be take as it is (read one key => one column ) by new comer to sql : )
– ken
Apr 10 '14 at 13:53
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How do I see the extensions loaded by PHP?
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and look at all the the extensions,
you can even enable or disable them by switching between On and Off like this
<Extension_name> = <[On | Off]>
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How can I auto-elevate my batch file, so that it requests from UAC administrator rights if required?
... that case the script just proceeds).
Check out this code (I was inspired by the code by NIronwolf posted in the thread Batch File - "Access Denied" On Windows 7?), but I've improved it - in my version there isn't any directory created and removed to check for administrator privileges):
::::::::...
What is the best way to get all the divisors of a number?
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This is of course dramatically better than dividing by every number up to n/2 or even sqrt(n), but this particular implementation has two drawbacks: quite innefective: tons of multiplication and exponentiation, repeatedly multiplying the same powers etc. Looks Pythonic, but I ...
RESTful API methods; HEAD & OPTIONS
...e communication options available on the request/response chain identified by the Request-URI. This method allows the client to determine the options and/or requirements associated with a resource, or the capabilities of a server, without implying a resource action or initiating a resource retrieval...
Git Clone: Just the files, please?
... git command that would be the closest from what you are looking for would by git archive.
See backing up project which uses git: it will include in an archive all files (including submodules if you are using the git-archive-all script)
You can then use that archive anywhere, giving you back only f...