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What generates the “text file busy” message in Unix?
...e the workaround:
gcc -g -Wall -o rmk1 main.o -L. -lrmk -L/Users/jleffler/lib/64 -ljl
if [ -f rmk ] ; then mv rmk rmk2 ; else true; fi ; mv rmk1 rmk
So, to avoid problems with the 'text file busy', the build created a new file rmk1, then moved the old rmk to rmk2 (rename wasn't a problem; unlink ...
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;
...