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Parsing a JSON string in Ruby
...rse JSON, simply use require 'json':
require 'json'
json = JSON.parse '{"foo":"bar", "ping":"pong"}'
puts json['foo'] # prints "bar"
See JSON at Ruby-Doc.
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Python: finding an element in a list [duplicate]
...ct attributes (which I need a lot):
el = [x for x in mylist if x.attr == "foo"][0]
Of course this assumes the existence (and, actually, uniqueness) of a suitable element in the list.
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Can Flask have optional URL parameters?
...rstand how to build the URL properly. You can get something like /page?arg=foo where it should be /foo/page . @Audrius Kažukauskas answer works in that case, but this doesn't
– rgargente
Nov 12 '19 at 16:08
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How do I decode HTML entities in Swift?
... // decode("&lt;") --> "<"
// decode("&foo;") --> nil
func decode(_ entity : Substring) -> Character? {
if entity.hasPrefix("&#x") || entity.hasPrefix("&#X") {
return decodeNumeric(entity.dropFirst(3).dropLast(...
How to assign the output of a Bash command to a variable? [duplicate]
...erforms globbing on these words. Always double-quote variable expansions "$foo" and command substitutions "$(foo)" (unless you specifically know you have not to).
In the general case, as other answers have mentioned already:
You can't use whitespace around the equal sign in an assignment: var=val...
How to find out where a function is defined?
...PHP 5):
one-liner to print the filename:
print (new ReflectionFunction("foo"))->getFileName();
Please note that it won't show you the location for internal functions (such as _), but it still can print the API for it as below.
to print the definition and parameters of the function:
print...
Are static class variables possible in Python?
...gt;> X.bar = 0
>>> x = X()
>>> x.bar
0
>>> x.foo
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
AttributeError: X instance has no attribute 'foo'
>>> X.foo = 1
>>> x.foo
1
And class instances can chan...
Initializing multiple variables to the same value in Java
...
Way too late to this but the simplest way I've found is:
String foo = bar = baz = "hello"
println(foo)
println(bar)
println(baz)
Output:
hello
hello
hello
Finding Key associated with max Value in a Java Map
...Or just the entry containing both, of course.)
For example:
Map.Entry<Foo, Bar> maxEntry = null;
for (Map.Entry<Foo, Bar> entry : map.entrySet())
{
if (maxEntry == null || entry.getValue().compareTo(maxEntry.getValue()) > 0)
{
maxEntry = entry;
}
}
...
How can I change or remove HTML5 form validation default error messages?
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When I set a title to "foo" I get "Please match the requested format. foo", so this won't work for me
– Daan
Mar 26 '14 at 8:35
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