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What is the direction of stack growth in most modern systems?
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Stack growth doesn't usually depend on the operating system itself, but on the processor it's running on. Solaris, for example, runs on x86 and SPARC. Mac OSX (as you mentioned) runs on PPC and x86. Linux runs on everything from my big honkin' Syste...
Select by partial string from a pandas DataFrame
...egex search is not required, so specify regex=False to disable it.
#select all rows containing "foo"
df1[df1['col'].str.contains('foo', regex=False)]
# same as df1[df1['col'].str.contains('foo')] but faster.
col
0 foo
1 foobar
Performance wise, regex search is slower than substring s...
what exactly is device pixel ratio?
...d device to download a very high resolution image, only to downscale it locally. You also don't want high-end devices to upscale low resolution images for a blurry user experience.
If you are stuck with bitmap images, to accommodate for many different device pixel ratios, you should use CSS Media Q...
Fastest way to tell if two files have the same contents in Unix/Linux?
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Why don't you get the hash of both files content?
Try this script, call it for example script.sh and then run it as follows: script.sh file1.txt file2.txt
#!/bin/bash
file1=`md5 $1`
file2=`md5 $2`
if [ "$file1" = "$file2" ]
then
echo "Files have the same content"
else
echo "Files h...
How to add a Timeout to Console.ReadLine()?
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I'm surprised to learn that after 5 years, all of the answers still suffer from one or more of the following problems:
A function other than ReadLine is used, causing loss of functionality. (Delete/backspace/up-key for previous input).
Function behaves badly when in...
Input placeholders for Internet Explorer
HTML5 introduced the placeholder attribute on input elements, which allows to display a greyed-out default text.
17 Ans...
Curious null-coalescing operator custom implicit conversion behaviour
...l; there's no need to check it for null a second time just because we are calling a lifted conversion operator". We'd them optimize it away to just
new int?(op_Implicit(temp2.Value))
My guess is that we are somewhere caching the fact that the optimized form of (int?)Foo() is new int?(op_implici...
Browser detection in JavaScript? [duplicate]
... +1 from me as well. Sometimes, it's not about feature support, it's actually about the browser. Yes, the user-agent info can be spoofed, but when you're dealing with older browsers and circumventing their bugs (like FF 3's issue with not sending the Content-Length header for read-only AJAX POST m...
How can I get a JavaScript stack trace when I throw an exception?
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Edit 2 (2017):
In all modern browsers you can simply call: console.trace(); (MDN Reference)
Edit 1 (2013):
A better (and simpler) solution as pointed out in the comments on the original question is to use the stack property of an Error objec...
Convert NaN to 0 in javascript
... only concerned with the specific NaN value. This won't work as a test for all non number values. Although we could attempt a toNumber conversion first. I'll update.
– user113716
Sep 24 '11 at 16:59
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