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Why do you need ./ (dot-slash) before executable or script name to run it in bash?
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Because on Unix, usually, the current directory is not in $PATH.
When you type a command the shell looks up a list of directories, as specified by the PATH variable. The current directory is not in that list.
The reason for not having the current directory on that li...
How to trace the path in a Breadth-First Search?
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You should have look at http://en.wikipedia.org/wiki/Breadth-first_search first.
Below is a quick implementation, in which I used a list of list to represent the queue of paths.
# graph is in adjacent list representation
graph = {
'1': ['2', '3', '4'],
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Round to 5 (or other number) in Python
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I don't know of a standard function in Python, but this works for me:
Python 2
def myround(x, base=5):
return int(base * round(float(x)/base))
Python3
def myround(x, base=5):
return base * round(x/base)
It is easy to see why the above works. You want to make sure th...
OpenLayers vs Google Maps? [closed]
...Google Maps a couple of times, but what wondering about OpenLayers .
Before starting any kind of coding, here are a couple of questions that come to my mind,
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What is the preferred syntax for initializing a dict: curly brace literals {} or the dict() function
I'm putting in some effort to learn Python, and I am paying close attention to common coding standards. This may seem like a pointlessly nit-picky question, but I am trying to focus on best-practices as I learn, so I don't have to unlearn any 'bad' habits.
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Why does Math.floor return a double?
Official Javadoc says that Math.floor() returns a double that is "equal to a mathematical integer", but then why shouldn't it return an int ?
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How to capture the browser window close event?
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The beforeunload event fires whenever the user leaves your page for any reason.
For example, it will be fired if the user submits a form, clicks a link, closes the window (or tab), or goes to a new page using the address bar, searc...
Why does printf not flush after the call unless a newline is in the format string?
Why does printf not flush after the call unless a newline is in the format string? Is this POSIX behavior? How might I have printf immediately flush every time?
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Easiest way to pass an AngularJS scope variable from directive to controller?
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Edited on 2014/8/25:
Here was where I forked it.
Thanks @anvarik.
Here is the JSFiddle. I forgot where I forked this. But this is a good example showing you the difference between = and @
<div ng-controller="MyCtrl">
<h2>Parent Scope</h2>...
Copy a stream to avoid “stream has already been operated upon or closed”
...ack if you're only going to use the data once, because you don't have to store it, and streams give you powerful "loop fusion" optimizations that let you flow the whole data efficiently through the pipeline.
If you want to re-use the same data, then by definition you either have to generate it tw...