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How do I create a variable number of variables?
...ou can use variable key names to achieve the effect of variable variables without the security risk.
>>> x = "spam"
>>> z = {x: "eggs"}
>>> z["spam"]
'eggs'
For cases where you're thinking of doing something like
var1 = 'foo'
var2 = 'bar'
var3 = 'baz'
...
a list may ...
How do I create an average from a Ruby array?
...r.inject(0.0) { |sum, el| sum + el } / arr.size
=> 6.5
You can define it as part of Array as another commenter has suggested, but you need to avoid integer division or your results will be wrong. Also, this isn't generally applicable to every possible element type (obviously, an average only ma...
What is the most effective way for float and double comparison?
...
Be extremely careful using any of the other suggestions. It all depends on context.
I have spent a long time tracing a bugs in a system that presumed a==b if |a-b|<epsilon. The underlying problems were:
The implicit presumption in an algorithm that if a==b and b==c then a==c...
How to create a zip archive of a directory in Python?
...'t really explain how you can use them to zip an entire directory. I think it's easiest to explain with some example code:
#!/usr/bin/env python
import os
import zipfile
def zipdir(path, ziph):
# ziph is zipfile handle
for root, dirs, files in os.walk(path):
for file in files:
...
Remove HTML Tags in Javascript with Regex
...out of a string in Javascript.
Heres what I have... I can't figure out why its not working....any know what I am doing wrong?
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How to add a new method to a php object on the fly?
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edited Mar 13 '13 at 20:59
Ivan Castellanos
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TypeScript typed array usage
I have a TypeScript class definition that starts like this;
3 Answers
3
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Replacing Spaces with Underscores
...
As of others have explained how to do it using str_replace, you can also use regex to achieve this.
$name = preg_replace('/\s+/', '_', $name);
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improve ...
Convert string to binary in python
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edited May 22 at 18:56
Akshay Pratap Singh
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How can I change the color of pagination dots of UIPageControl?
I am developing an application in which I want to change either color or image of UIPageControl pagination dots. How can I change it? Is it possible to customize UIpageControl on above scenario?
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