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Rails: Why does find(id) raise an exception in rails? [duplicate]
... (1, 5, 6), or an array of ids ([5, 6, 10]). If no record can be found for all of the listed ids, then RecordNotFound will be raised.
If you don't want the exception to be raised, use find_by_id, which will return nil if it can't find an object with the specified id. Your example would then be Us...
Javascript roundoff number to nearest 0.5
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rounding the num*2 is not working for all case..try any decimal like 15.27 => using your formula will give => 15 where in fact it should have returned 15.5. **** I think using toFixed will be better (num*2).toFixed()/2
– sfdx bomb
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Store query result in a variable using in PL/pgSQL
...s, as @Pavel commented.
I shortened the syntax with a table alias additionally.
Update: I removed my code example and suggest to use IF EXISTS() instead like provided by @Pavel.
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Add a prefix string to beginning of each line
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You can use Vim in Ex mode:
ex -sc '%s/^/prefix/|x' file
% select all lines
s replace
x save and close
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in Ipython notebook / Jupyter, Pandas is not displaying the graph I try to plot
...ndas in Ipython Notebook, and while it gives me the object, it doesn't actually plot the graph itself. So it looks like this:
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.NET WebAPI Serialization k_BackingField Nastiness
...rk with Web API.
Just leave your model as is, and Web API would serialize all the public properties for you.
Only if you want to have more control about what's included, you then decorate your class with [DataContract] and the properties to be included with [DataMember] (because both DCS and JSON...
Index of Currently Selected Row in DataGridView
...ndex error two. You'd better wrapped it with a if
– Allan Ruin
Mar 11 '15 at 1:22
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grep exclude multiple strings
I am trying to see a log file using tail -f and want to exclude all lines containing the following strings:
7 Answers
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How to run Nginx within a Docker container without halting?
I have Nginx installed on a Docker container, and am trying to run it like this:
9 Answers
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Any way to force strict mode in node?
...newer the --use_strict flag works as expected.
– TooTallNate
Feb 5 '13 at 5:52
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Note that --use...