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optional local variables in rails partial templates: how do I get out of the (defined? foo) mess?
...fault_value when default_value is a method, as it will be called anyway in order to pass its result to fetch.
If your default_value is a method, you can wrap it in a block: local_assigns.fetch(:foo) { default_value } to prevent its call when it's not needed.
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Programmatically access currency exchange rates [closed]
I'm setting up an online ordering system but I'm in Australia and for international customers I'd like to show prices in US dollars or Euros so they don't have to make the mental effort to convert from Australian dollars.
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What is the difference between the different methods of putting JavaScript code in an ?
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Method #2 of what? The questions don't stay in the same order as when YOU saw them.
– Diodeus - James MacFarlane
Oct 29 '08 at 12:43
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Copy folder recursively, excluding some folders
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I suggest to add the --dry-run in order to check which files are going to be copied.
– loretoparisi
Sep 20 '13 at 10:14
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What is the Ruby (spaceship) operator?
...es not work as expected. The factors should be powers of two in descending order, i.e. 8, -4, 2, 1. The way you wrote it (with factors 4,-3,2,1), e.g. "age + lastname" counts more than "zip"...
– Elmar Zander
Sep 23 '19 at 5:51
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How do I use boolean variables in Perl?
... native boolean type, but you can use comparison of integers or strings in order to get the same behavior. Alan's example is a nice way of doing that using comparison of integers. Here's an example
my $boolean = 0;
if ( $boolean ) {
print "$boolean evaluates to true\n";
} else {
print "$boo...
Difference between >>> and >>
...ts are interpreted in two's complement.
Therefore, if you are shifting in order to divide by a power of two, you want the arithmetic right shift (v >> n). It returns a value in which the bits in v have been shifted to the right by n bit positions, and copies of the leftmost bit of v are shift...
Why are global variables evil? [closed]
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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How to trick an application into thinking its stdout is a terminal, not a pipe
...d a colourful version of git status | less. You need to pass -R to less in order that it respect the colours, and you need to use script to get git status to output colour. But we don't want script to keep ownership of the keyboard, we want this to go to less. So I use this now and it works well: 0&...
How do I load the contents of a text file into a javascript variable?
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A compact and working code, Vic, thanks you. In order to achieve error handling, would it be possible to put some response.ok (or equivalent) somewhere in your code? I am not very experienced on fetch, so I don't know the exact place to set it.
– Sopa...