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Rails detect if request was AJAX
...t; /asfd/ =~ 'haystack'
=> nil
It's based on this:
# File actionpack/lib/action_dispatch/http/request.rb, line 220
def xml_http_request?
@env['HTTP_X_REQUESTED_WITH'] =~ /XMLHttpRequest/
end
so
env['HTTP_X_REQUESTED_WITH'] =~ /XMLHttpRequest/ => 0
The docs:
http://apidock.com/rai...
Defining a percentage width for a LinearLayout? [duplicate]
...As a latest update to android in 2015, Google has included percent support library
com.android.support:percent:23.1.0
You can refer to this site for example of using it
https://github.com/JulienGenoud/android-percent-support-lib-sample
Gradle:
dependencies {
compile 'com.android.sup...
How to remove a key from Hash and get the remaining hash in Ruby/Rails?
...
Since Ruby 2.5 Hash#slice is in the standard library. ruby-doc.org/core-2.5.0/Hash.html#method-i-slice Yay!
– Madis Nõmme
Nov 12 '19 at 15:03
...
How to know what the 'errno' means?
... 3. Most implementations DO write to internal static buffer, including GNU LibC implementation
– StaceyGirl
Jun 9 '17 at 19:46
...
How can you profile a Python script?
...ion, but it is in the module. See hg.python.org/cpython/file/6bf07db23445/Lib/cProfile.py#l140. That allows you to profile a specific function call, and in our case we want to profile the Thread's target function, which is what the threading.Thread.run() call executes. But as I said in the answer...
In Python, how can you load YAML mappings as OrderedDicts?
...lass, which can lead to troublesome side effects. Especially, when writing library code this is a bad idea. Also, it doesn't directly work with yaml.safe_load().
Fortunately, the solution can be improved without much effort:
import yaml
from collections import OrderedDict
def ordered_load(stream,...
Can a program depend on a library during compilation but not runtime?
...d to the classpath on runtime (e.g. in wars they will be copied to WEB-INF/lib).
It is not, however, strictly required; for instance, we may compile against a certain API, making it a compile-time dependency, but then at runtime include an implementation that also includes the API.
There may be fr...
How to deal with a slow SecureRandom generator?
...d, which is guaranteed not to block.
To do it globally, edit the file jre/lib/security/java.security in your default Java installation to use /dev/urandom (due to another bug it needs to be specified as /dev/./urandom).
Like this:
#securerandom.source=file:/dev/random
securerandom.source=file:/de...
How to jQuery clone() and change id?
...+ i);
i++;
});
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
<div id="test">
<button>Clone</button>
<div class="red" id="red">
</div>
</div>
<style>
.red {
width:20px;
...
Does JSON syntax allow duplicate keys in an object?
...ely assume that means they are allowed.
That most implementations of JSON libraries do not accept duplicate keys does not conflict with the standard, because of the first quote.
Here are two examples related to the C++ standard library. When deserializing some JSON object into a std::map it would ...