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How does Dijkstra's Algorithm and A-Star compare?
...f each node is calculated by f(x)=g(x)+h(x)
A* search only expands a node if it seems promising. It only focuses to reach the goal node from the current node, not to reach every other nodes. It is optimal, if the heuristic function is admissible.
So if your heuristic function is good to approximat...
Right way to initialize an OrderedDict using its constructor such that it retains order of initial d
...t comprehension in your last example doesn't change anything. There's no difference between OrderedDict([(i,i) for i in l]) and OrderedDict([('b', 'b'), ('a', 'a'), ('c', 'c'), ('aa', 'aa')]). The list comprehension is evaluated and creates the list and it is passed in; OrderedDict knows nothing a...
In Python, how does one catch warnings as if they were exceptions?
...arnings.simplefilter("always")
# Trigger a warning.
fxn()
# Verify some things
assert len(w) == 1
assert issubclass(w[-1].category, DeprecationWarning)
assert "deprecated" in str(w[-1].message)
share...
Where can I view Tomcat log files in Eclipse?
...
I'm not sure if you were after catalina.out or one of the other logs produced by Tomcat.
But, if you're after the catalina.out log file then follow the directions below:
In the servers tab, double-click on the Tomcat Server. You will g...
How to convert a Drawable to a Bitmap?
...w URL(name);
ImageView profile = (ImageView)v.findViewById(R.id.vdo_icon);
if (profile != null) {
Bitmap mIcon1 =
BitmapFactory.decodeStream(url_value.openConnection().getInputStream());
profile.setImageBitmap(mIcon1);
}
...
What's the maximum value for an int in PHP?
...
Well, on amd64 linux, which is quite common nowadays, its 9223372036854775807 (2^63-1)
– derobert
Mar 22 '09 at 7:51
4
...
How do I test for an empty JavaScript object?
... keys).
Pre-ECMA 5:
function isEmpty(obj) {
for(var prop in obj) {
if(obj.hasOwnProperty(prop)) {
return false;
}
}
return JSON.stringify(obj) === JSON.stringify({});
}
jQuery:
jQuery.isEmptyObject({}); // true
lodash:
_.isEmpty({}); // true
Underscore:
_.isEmpty({});...
How do I remove all non alphanumeric characters from a string except dash?
...
@BrianScott I know this is old, but was found in a search so I feel this is relevant. This actually depends on the version of .NET you are running under. > 2.0 uses "" & string.Empty exactly the same. stackoverflow.com/questions/151...
How do I send a POST request with PHP?
...ray('key1' => 'value1', 'key2' => 'value2');
// use key 'http' even if you send the request to https://...
$options = array(
'http' => array(
'header' => "Content-type: application/x-www-form-urlencoded\r\n",
'method' => 'POST',
'content' => http_buil...
List directory in Go
...t directory (folders are included but not specially marked - you can check if an item is a folder by using the IsDir() method):
package main
import (
"fmt"
"io/ioutil"
"log"
)
func main() {
files, err := ioutil.ReadDir("./")
if err != nil {
log.Fatal(err)
}
f...