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What is the colon operator in Ruby?
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:foo is a symbol named "foo". Symbols have the distinct feature that any two symbols named the same will be identical:
"foo".equal? "foo" # false
:foo.equal? :foo # true
This makes comparing two symbols really fast (since o...
HTML Entity Decode [duplicate]
...ould try something like:
var Title = $('<textarea />').html("Chris&apos; corner").text();
console.log(Title);
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
JS Fiddle.
A more interactive version:
$('form').submit(fun...
MySQL “incorrect string value” error when save unicode string in Django
... (yes, it's wack, nicely summed up by a Django developer here)
To solve this you need to:
Change your MySQL database, table and columns to use the utf8mb4 character set (only available from MySQL 5.5 onwards)
Specify the charset in your Django settings file as below:
settings.py
DATABASES = ...
How to reverse-i-search back and forth? [duplicate]
...ommand I am actually looking for. Because CTRL + r searches backward in history, from newest to oldest, I have to:
3 Answ...
What does the unary plus operator do?
... from smaller integral types to int, or ensure that an expression's result is treated as an rvalue and therefore not compatible with a non-const reference parameter. I submit, however, that these uses are better suited to code golf than readability. :-)
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Spring @PropertySource using YAML
... my tests. If I annotate my TestConfiguration (a simple Java config), it is expecting a properties file.
16 Answers
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How to keep environment variables when using sudo
..., you need to read man sudo carefully, and pay attention to the -E flag. This works:
$ export HTTP_PROXY=foof
$ sudo -E bash -c 'echo $HTTP_PROXY'
Here is the quote from the man page:
-E, --preserve-env
Indicates to the security policy that the user wishes to preserve their
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Is there “Break on Exception” in IntelliJ?
Is there feature that will automatically break debugging on first exception occurrence?
6 Answers
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Omitting the second expression when using the if-else shorthand
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This is also an option:
x==2 && dosomething();
dosomething() will only be called if x==2 is evaluated to true. This is called Short-circuiting.
It is not commonly used in cases like this and you really shouldn't wri...
How do I reverse an int array in Java?
...verse an int array, you swap items up until you reach the midpoint, like this:
for(int i = 0; i < validData.length / 2; i++)
{
int temp = validData[i];
validData[i] = validData[validData.length - i - 1];
validData[validData.length - i - 1] = temp;
}
The way you are doing it, you sw...