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Get type of all variables
...character
typeof(3 + 四) #R pukes on unicode error
typeof(iconv("a", "latin1", "UTF-8")) #UTF-8 characters character
typeof(5 == 5) #result of a comparison: logical
How to get the class of a variable you have in R
The R function class ...
Does Java support default parameter values?
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answered Jun 15 '09 at 18:05
Rob HRob H
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Why doesn't print work in a lambda?
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edited Jun 5 '16 at 23:05
Whymarrh
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answered...
Solution for “Fatal error: Maximum function nesting level of '100' reached, aborting!” in PHP
I have made a function that finds all the URLs within an html file and repeats the same process for each html content linked to the discovered URLs. The function is recursive and can go on endlessly. However, I have put a limit on the recursion by setting a global variable which causes the recursion...
How to find common elements from multiple vectors?
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– Montgomery Clift
Oct 3 '19 at 8:05
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OS X: equivalent of Linux's wget
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edited Sep 3 '17 at 20:05
Mark Amery
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Find index of last occurrence of a substring in a string
... recent call last):
File "<stdin>", line 1, in <module>
ValueError: substring not found
The difference is when the substring is not found, rfind() returns -1 while rindex() raises an exception ValueError (Python2 link: ValueError).
If you do not want to check the rfind() return cod...
DISTINCT for only one column
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If you are using SQL Server 2005 or above use this:
SELECT *
FROM (
SELECT ID,
Email,
ProductName,
ProductModel,
ROW_NUMBER() OVER(PARTI...
How to check version of python modules?
...nt call last):
File "<string>", line 1, in <module>
AttributeError: 'module' object has no attribute '__version__'
Lastly, as the commands in your question are prefixed with sudo, it appears you're installing to the global python environment. Strongly advise to take look into python ...
ModelState.IsValid == false, why?
Where can I find the list of errors of which make the ModelState invalid? I didn't see any errors property on the ModelState object.
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