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Checking if a variable is not nil and not zero in ruby
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You could do this:
if (!discount.nil? && !discount.zero?)
The order is important here, because if discount is nil, then it will not have a zero? method. Ruby's short-circuit evaluation should prevent it from trying to evaluate discount.zero?, however, if discount is nil.
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how can I Update top 100 records in sql server
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Any idea how to use the order by as well?
– Joe Phillips
Feb 27 '13 at 18:30
8
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Create Windows service from executable
...u'll (almost certainly) have to run the command prompt as Administrator in order for this command to work
– Jeutnarg
Aug 29 '16 at 21:10
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What is the difference between Builder Design pattern and Factory Design pattern?
...en the two more clear.
Suppose, you went to a fast food restaurant and you ordered Food.
1) What Food?
Pizza
2) What toppings?
Capsicum, Tomato, BBQ chicken, NO PINEAPPLE
So different kinds of foods are made by Factory pattern but the different variants(flavors) of a particular food are made by Buil...
Validating IPv4 addresses with regexp
...ress. Anyone that wishes to edit this answer, please comment first here in order to avoid problems like these - I usually reply pretty fast. Always looking for a shorter/better solution of course.
– Danail Gabenski
Dec 25 '19 at 6:16
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What are the rules for evaluation order in Java?
...me say this very clearly, because people misunderstand this all the time:
Order of evaluation of subexpressions is independent of both associativity and precedence. Associativity and precedence determine in what order the operators are executed but do not determine in what order the subexpressions ...
How do you read a file into a list in Python? [duplicate]
...e-character by using the strip()-method. I.e. call lines[index].strip() in order to get the string without the newline character.
As joaquin noted, do not forget to f.close() the file.
Converting strint to integers is easy: int("12").
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Why does MYSQL higher LIMIT offset slow the query down?
...her LIMIT offset with SELECT, the slower the query becomes, when using ORDER BY *primary_key*
6 Answers
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How to listen for changes to a MongoDB collection?
...ase-notes/3.6/ 2018/01/10
$ mongod --version
db version v3.6.2
In order to use changeStreams the database must be a Replication Set
More about Replication Sets:
https://docs.mongodb.com/manual/replication/
Your Database will be a "Standalone" by default.
How to Convert...
Java 32-bit vs 64-bit compatibility
...ibraries and no 64 bit equivalent was available, so back to 32 bit was the order of the day..
– Fortyrunner
Dec 3 '14 at 22:05
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