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What is the easiest way to duplicate an activerecord record?
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To get a copy, use the clone (or dup for rails 3.1+) method:
# rails < 3.1
new_record = old_record.clone
#rails >= 3.1
new_record = old_record.dup
Then you can change whichever fields you want.
ActiveRecord overrides the built-in Object#clone to give you a new (not s...
What does the caret (‘^’) mean in C++/CLI?
I just came across this code and a few Google searches turn up no explanation of this mysterious (to me) syntax.
7 Answers
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The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communicat
... SOAP fault, either.
Now since the server side "bombed" out, the WCF runtime has "faulted" the channel - e.g. the communication link between the client and the server is unusable - after all, it looks like your server just blew up, so you cannot communicate with it any more.
So what you need to do...
Java 8 method references: provide a Supplier capable of supplying a parameterized result
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Sure.
.orElseThrow(() -> new MyException(someArgument))
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How to check if hex color is “too black”?
...ters of the hex value to pull this off. It's working, but it's switching some legitimately "light" colors too.
8 Answers
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JavaScript math, round to two decimal places [duplicate]
...values beyond 2 decimals.
Example: http://jsfiddle.net/calder12/tv9HY/
Documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toFixed
Edit - As mentioned by others this converts the result to a string. To avoid this:
var discount = +((price / listprice...
What is the use of the @ symbol in PHP?
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It suppresses error messages — see Error Control Operators in the PHP manual.
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TortoiseHg Apply a Patch
TortoiseHg allows you to email a patch file of your changes to someone, but does it support applying patches?
4 Answers
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How can I copy & paste, or duplicate, an existing project?
...w job" and then select "Copy existing job" at the bottom. Then enter the name of the job you want to copy into the text field.
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boolean in an if statement
...ring the way I check whether a variable is true or false in a school assignment.
14 Answers
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