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How to write a switch statement in Ruby
...
It is done using case in Ruby. Also see "Switch statement" on Wikipedia.
Quoted:
case n
when 0
puts 'You typed zero'
when 1, 9
puts 'n is a perfect square'
when 2
puts 'n is a prime number'
puts 'n is an even number'
when ...
static constructors in C++? I need to initialize private static objects
... thanks! though that's very annoying to have to do all that. One of the many "mistakes" C# and java learned from.
– Gordon Gustafson
Jul 28 '09 at 22:59
110
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AngularJs: How to check for changes in file input fields?
...our File</button>
<input type="file" style="display:none"
id="file" name='file' onchange="angular.element(this).scope().fileNameChanged(this)" />
</form>
</div>
instead of
<input type="file" style="display:none"
id="fil...
Add new value to an existing array in JavaScript [duplicate]
...like any other built-in JavaScript class, is not a keyword. Therefore, someone could easily define Array in your code to do something other than construct an array.
share
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improve this answer
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Parse error: Syntax error, unexpected end of file in my PHP code
...not (or rather fcgi does not) so if your stumped by why this is working on one web server and not another you know why
– Sammaye
Jul 18 '14 at 13:53
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How to compare objects by multiple fields
...a of using a single Comparator. I don't think this answer is wrong, but anyone reading it should definitely check Steve Kuo answer below.
– Felipe Leão
Nov 13 '14 at 12:15
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Renaming a virtualenv folder without breaking it
...e | grep -v "^Binary file" | grep -i venv-name. In fact, I noticed that in one of my Django instances, a lot of the packages had the "path to Python sh-bang" in them.
– Kevin
May 23 '16 at 14:01
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Group by multiple columns in dplyr, using string vector input
...= names(data)[-3]
library(dplyr)
df1 <- data %>%
group_by_at(vars(one_of(columns))) %>%
summarize(Value = mean(value))
#compare plyr for reference
df2 <- plyr::ddply(data, columns, plyr::summarize, value=mean(value))
table(df1 == df2, useNA = 'ifany')
## TRUE
## 27
The output ...
Convert a Git folder to a submodule retrospectively?
...g a project of some kind, and after a while it becomes clear that some component of the project is actually useful as a standalone component (a library, perhaps). If you've had that idea from early on, then there's a fair chance that most of that code is in its own folder.
...
How can I print a circular structure in a JSON-like format?
... In the following case, a value is discarded:
var a = {b:1}
var o = {};
o.one = a;
o.two = a;
// one and two point to the same object, but two is discarded:
JSON.stringify(o, ...);
But the concept stands: Use a custom replacer, and keep track of the parsed object values.
As a utility function wr...