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Why doesn't Dijkstra's algorithm work for negative weight edges?
...e true. For example:
A
/ \
/ \
/ \
5 2
/ \
B--(-10)-->C
V={A,B,C} ; E = {(A,C,2), (A,B,5), (B,C,-10)}
Dijkstra from A will first develop C, and will later fail to find A->B->C
EDIT a bit deeper explanation:
Note that this is important...
HtmlSpecialChars equivalent in Javascript?
...but it performs better, particularly on large blocks of text (thanks jbo5112).
function escapeHtml(text) {
var map = {
'&': '&',
'<': '&lt;',
'>': '&gt;',
'"': '&quot;',
"'": '&#039;'
};
return text.replace(/[&<>"']/g, function...
What's the maximum value for an int in PHP?
...
124
From the PHP manual:
The size of an integer is
platform-dependent, although a maximum
value of...
How do you log content of a JSON object in Node.js?
...
279
Try this one:
console.log("Session: %j", session);
If the object could be converted into JS...
What is the preferred syntax for initializing a dict: curly brace literals {} or the dict() function
...
243
Curly braces. Passing keyword arguments into dict(), though it works beautifully in a lot of s...
How to do the equivalent of pass by reference for primitives in Java
...tln("Toy number in play after increement " + toy.toyNumber);
}
Choice 2: return the value instead of pass by reference
int play(int toyNumber){
System.out.println("Toy number in play " + toyNumber);
toyNumber++;
System.out.println("Toy number in play after increement " + toy...
How to draw polygons on an HTML5 canvas?
...e a path with moveTo and lineTo (live demo):
var ctx = canvas.getContext('2d');
ctx.fillStyle = '#f00';
ctx.beginPath();
ctx.moveTo(0, 0);
ctx.lineTo(100,50);
ctx.lineTo(50, 100);
ctx.lineTo(0, 90);
ctx.closePath();
ctx.fill();
...
Why does a base64 encoded string have an = sign at the end
...
282
It serves as padding.
A more complete answer is that a base64 encoded string doesn't always e...
Python 3: ImportError “No Module named Setuptools”
...pt-get install python3-setuptools
For an older version of Python (Python 2.x):
sudo apt-get install python-setuptools
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