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psql: FATAL: role “postgres” does not exist
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432
NOTE: If you installed postgres using homebrew, see the comment from @user3402754 below.
Not...
Rounding up to next power of 2
I want to write a function that returns the nearest next power of 2 number. For example if my input is 789, the output should be 1024. Is there any way of achieving this without using any loops but just using some bitwise operators?
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Checking if a string can be converted to float in Python
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'1.43'.replace('.','',1).isdigit()
which will return true only if there is one or no '.' in the string of digits.
'1.4.3'.replace('.','',1).isdigit()
will return false
'1.ww'.replace('.','',1).isdigit()
will return fal...
Random row from Linq to Sql
What is the best (and fastest) way to retrieve a random row using Linq to SQL when I have a condition, e.g. some field must be true?
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How to convert C# nullable int to int
How do I convert a nullable int to an int ? Suppose I have 2 type of int as below:
17 Answers
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PHP parse/syntax errors; and how to solve them
Everyone runs into syntax errors. Even experienced programmers make typos. For newcomers, it's just part of the learning process. However, it's often easy to interpret error messages such as:
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'console' is undefined error for Internet Explorer
... with IE.
– Israel
May 28 '13 at 19:43
6
The problem with that answer is if you are using another...
How do I check if a string contains a specific word?
...d boundries. Alternatives are always useful.
– user764357
Aug 20 '13 at 5:57
15
+1 for the answer...
T-SQL Cast versus Convert
What is the general guidance on when you should use CAST versus CONVERT ? Is there any performance issues related to choosing one versus the other? Is one closer to ANSI-SQL?
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How do I choose grid and block dimensions for CUDA kernels?
...2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 ...