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How do you do natural logs (e.g. “ln()”) with numpy in Python?
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np.log is ln, whereas np.log10 is your standard base 10 log.
Relevant documentation:
http://docs.scipy.org/doc/numpy/reference/generated/numpy.log.html
http://docs.scipy.org/doc/numpy/reference/generated/numpy.log10.html
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Why does “while(true)” without “Thread.sleep” cause 100% CPU usage on Linux but not on Windows?
...Let's say you have 4 cores:
With IRIX mode on, 1 fully utilized core is 100% and 4 cores are 400%.
With IRIX mode off, 1 fully utilized core is 25% and 4 cores are 100%.
This means that by default, top on Linux will show an infinite loop as ~100% and Windows will show it as ~25%, and it means ...
What is the difference between gsub and sub methods for Ruby Strings
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209
The g stands for global, as in replace globally (all):
In irb:
>> "hello".sub('l', '*')...
Calling clojure from java
...intln (str "(binomial 5 3): " (binomial 5 3)))
(println (str "(binomial 10042 111): " (binomial 10042 111)))
)
If you run it, you should see something like:
(binomial 5 3): 10
(binomial 10042 111): 49068389575068144946633777...
And here's a Java program that calls the -binomial function in th...
from jquery $.ajax to angular $http
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202
The AngularJS way of calling $http would look like:
$http({
url: "http://example.appspot.c...
Is there a difference between /\s/g and /\s+/g?
...g replaced with the empty string because of the +.
However, just like how 0 multiplied by anything else is 0, it seems as if both methods strip spaces in exactly the same way.
If you change the replacement string to '#', the difference becomes much clearer:
var str = ' A B C D EF ';
console.l...
In Hibernate Validator 4.1+, what is the difference between @NotNull, @NotEmpty, and @NotBlank?
...he CharSequence, Collection, Map or Array object is not null and size > 0.
@NotBlank: The string is not null and the trimmed length is greater than zero.
To help you understand, let's look into how these constraints are defined and carried out (I'm using version 4.1):
The @NotNull constrain...
How can I detect whether an iframe is loaded?
... src:'https://heera.it',
style:'display:none;width:320px;height:400px',
load:function(){
$(this).show();
alert('iframe loaded !');
}
});
$('body').append(ifr);
});
});
<script src="https...
git produces Gtk-WARNING: cannot open display
... |
edited Jun 27 '13 at 7:07
answered Apr 19 '13 at 12:19
J...
A semantics for Bash scripts?
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107
A shell is an interface for the operating system. It is usually a more-or-less robust programmi...