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Is Big O(logn) log base e?
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But it's very easy to show that log_2 n is in Θ(log_a n) for any base a, so I'm not sure I see how using base 2 is "more correct".
– bcat
Oct 15 '09 at 0:34
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Is it possible to run a single test in MiniTest?
...b -l 25
Yup! Use Nick Quaranto's "m" gem. With it you can say:
m spec/my_spec.rb:25
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When do we need curly braces around shell variables?
...ing practice. This is both for consistency and to avoid surprises like $foo_$bar.jpg, where it's not visually obvious that the underscore becomes part of the variable name.
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How to disable scrolling temporarily?
...croll DOMMouseScroll.disablescroll touchmove.disablescroll",
t._handleWheel
);
t.$container.on("scroll.disablescroll", function() {
t._handleScrollbar.call(t);
});
if(t.opts.handleKeys) {
t.$document.on("keydown.disablescroll", fu...
Does Java have something like C#'s ref and out keywords?
...mulate reference with wrappers.
And do the following:
void changeString( _<String> str ) {
str.s("def");
}
void testRef() {
_<String> abc = new _<String>("abc");
changeString( abc );
out.println( abc ); // prints def
}
Out
void setString( _<String> re...
Query for documents where array size is greater than 1
...r: [{name: {$exists: false}}, {name: {$size: 0}}, {name: {$size: 1}}]})
{ "_id" : ObjectId("511907e3fb13145a3d2e225b"), "name" : [ "George", "Raymond" ] }
{ "_id" : ObjectId("511907e3fb13145a3d2e225c"), "name" : [ "George", "Raymond", "Richard" ] }
{ "_id" : ObjectId("511907e3fb13145a3d2e225d"), "na...
What is the difference between linear regression and logistic regression?
...gistic regression was introduced.
Source: http://gerardnico.com/wiki/data_mining/simple_logistic_regression
Outcome
In linear regression, the outcome (dependent variable) is continuous.
It can have any one of an infinite number of possible values.
In logistic regression, the outcome (dependen...
Installing Java 7 on Ubuntu
...e JDK on the desk and I set environment variables (PATH, CLASSPATH and JAVA_HOME).
From the terminal, if I type java -version I get printed
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How can I replace every occurrence of a String in a file with PowerShell?
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(Get-Content file.txt) |
Foreach-Object {$_ -replace '\[MYID\]','MyValue'} |
Out-File file.txt
Note the parentheses around (Get-Content file.txt) is required:
Without the parenthesis the content is read, one line at a time, and flows down the pipeline until i...
How do I size a UITextView to its content?
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I recommend to use CGFLOAT_MAX macro instead of MAXFLOAT. Proper on both of 32/64 bit platforms.
– eonil
Aug 27 '14 at 14:18
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