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Get difference between two lists
...is:
s = set(temp2)
temp3 = [x for x in temp1 if x not in s]
Performance test
import timeit
init = 'temp1 = list(range(100)); temp2 = [i * 2 for i in range(50)]'
print timeit.timeit('list(set(temp1) - set(temp2))', init, number = 100000)
print timeit.timeit('s = set(temp2);[x for x in temp1 if x ...
No connection could be made because the target machine actively refused it?
...e web service has started up more slowly than the client application while testing. Still adding retry logic is defintely the way to go.
– Martin Brown
Mar 8 '12 at 9:42
...
AngularJS - $anchorScroll smooth/duration
...e. I did some small changes on his solution in terms of modularization and testability.
Here's is yet another working example on JsFiddle that includes the other version with testing included.
For testing, I'm using Karma and Jasmine. Signature has been slightly modified as follows:
anchorSmooth...
Detecting endianness programmatically in a C++ program
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I've tested this, and in both gcc 4.0.1 and gcc 4.4.1 the result of this function can be determined at compile time and treated as a constant. This means that the compiler will drop if branches that depend solely on the result of...
Get top 1 row of each group
I have a table which I want to get the latest entry for each group. Here's the table:
20 Answers
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How to read from a file or STDIN in Bash?
...
Here is the simplest way:
#!/bin/sh
cat -
Usage:
$ echo test | sh my_script.sh
test
To assign stdin to the variable, you may use: STDIN=$(cat -) or just simply STDIN=$(cat) as operator is not necessary (as per @mklement0 comment).
To parse each line from the standard input, t...
Absolute vs relative URLs
...to:
switch to another scheme (e.g. http -> https)
switch domain names (test.yourdomain.com -> yourdomain.com)
In the first example what will happen is that you will get warnings about unsafe content being requested on the page. Because all your URLs are hardcoded to use http(://yourdomain.co...
Why does InetAddress.isReachable return false, when I can ping the IP address?
... many cases. You can scroll to the bottom to see my alternative for simply testing if you're online and capable of resolving external hosts (i.e. google.com) ... Which generally seems to work on *NIX machines.
The issue
There is alot of chatter about this :
Here are other, similar questions :...
Count rows with not empty value
...rly complex, or fail in particular edge cases that I've enumerated in this test sheet:
Google Spreadsheet - CountA Test - Demo
For why CountA works the wonky way it does, see my answer here
share
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How to split a string in Java
...tring[] parts = string.split(Pattern.quote(".")); // Split on period.
To test beforehand if the string contains certain character(s), just use String#contains().
if (string.contains("-")) {
// Split it.
} else {
throw new IllegalArgumentException("String " + string + " does not contain -"...