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SQL - many-to-many table primary key
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edited Apr 30 '15 at 3:16
answered Feb 3 '10 at 7:20
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Why are floating point numbers inaccurate?
...icand). A very simple number, say 9.2, is actually this fraction:
5179139571476070 * 2 -49
Where the exponent is -49 and the mantissa is 5179139571476070. The reason it is impossible to represent some decimal numbers this way is that both the exponent and the mantissa must be integers. In othe...
Why does this (null || !TryParse) conditional result in “use of unassigned local variable”?
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3 Answers
3
Active
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Get exception description and stack trace which caused an exception, all as a string
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653
See the traceback module, specifically the format_exc() function. Here.
import traceback
try:
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How do I wrap link_to around some html ruby code?
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edited Apr 20 '15 at 9:43
Arslan Ali
15.7k77 gold badges4545 silver badges6363 bronze badges
answered ...
MySQL: Set user variable from result of query
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337
Yes, but you need to move the variable assignment into the query:
SET @user := 123456;
SELECT...
Appropriate datatype for holding percent values?
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133
Assuming two decimal places on your percentages, the data type you use depends on how you plan ...
How to execute AngularJS controller function on page load?
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430
On the one hand as @Mark-Rajcok said you can just get away with private inner function:
// at ...
What is scope/named_scope in rails?
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213
A scope is a subset of a collection. Sounds complicated? It isn't. Imagine this:
You have Users...