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(Built-in) way in JavaScript to check if a string is a valid number
...rns true if the variable does NOT contain a valid number
Examples
isNaN(123) // false
isNaN('123') // false
isNaN('1e10000') // false (This translates to Infinity, which is a number)
isNaN('foo') // true
isNaN('10px') // true
Of course, you can negate this if you need...
Add a prefix to all Flask routes
..._ROOT config value to your prefix:
app.config["APPLICATION_ROOT"] = "/abc/123"
@app.route("/")
def index():
return "The URL for this page is {}".format(url_for("index"))
# Will return "The URL for this page is /abc/123/"
Setting the APPLICATION_ROOT config value simply limit Flask's session...
How do I immediately execute an anonymous function in PHP?
...
@yes123 nope. still have to use call_user_func
– Gordon
Oct 30 '12 at 22:41
2
...
Fixing the order of facets in ggplot
...))
temp %>%
arrange(size_num) %>% # sort
mutate_at(vars(size), funs(factor(., levels=unique(.)))) %>% # convert to factor
ggplot() +
geom_bar(aes(x = type, y=amount, fill=type),
position="dodge", stat="identity") +
facet_grid(~ size)
You can apply this solution ...
What are some uses of decltype(auto)?
...ence or a value. decltype(auto) gives you that ability:
template<class Fun, class... Args>
decltype(auto) Example(Fun fun, Args&&... args)
{
return fun(std::forward<Args>(args)...);
}
Delaying return type deduction in recursive templates
In this Q&A a few days ago,...
Where can I find documentation on formatting a date in JavaScript?
...
Both of these sites have restrictive licenses. So if you use the code (without permission), you'll be in violation. Momentjs (stackoverflow.com/a/10119138/278976) looks like a way better option and is MIT license.
– H...
Func vs. Action vs. Predicate [duplicate]
...lt;int> myAction = new Action<int>(DoSomething);
myAction(123); // Prints out "123"
// can be also called as myAction.Invoke(123);
Func<int, double> myFunc = new Func<int, double>(CalculateSomething);
Console.Wr...
Inspect attached event handlers for any DOM element
Is there any way to view what functions / code are attached to any event for a DOM element? Using Firebug or any other tool.
...
Save modifications in place with awk
...ace.awk include file to invoke the extension properly like so:
$ cat file
123 abc
456 def
789 hij
$ gawk -i inplace '{print $1}' file
$ cat file
123
456
789
The variable INPLACE_SUFFIX can be used to specify the extension for a backup file:
$ gawk -i inplace -v INPLACE_SUFFIX=.bak '{print $1}'...
differences in application/json and application/x-www-form-urlencoded
...
What implications does it have on the server side. I see sites like stackoverflow & Twitter use x-www-form-urlencoded for AJAX requests like vote etc. The response sent back is JSON. I would think that it's better to have a symmetrical request/response pair i.e. both JSON.
...