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When should I use genetic algorithms as opposed to neural networks? [closed]
Is there a rule of thumb (or set of examples) to determine when to use genetic algorithms as opposed to neural networks (and vice-versa) to solve a problem?
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multiple definition of template specialization when using different objects
...lized template in different object files, I get a "multiple definition" error when linking. The only solution I found involves using the "inline" function, but it just seems like some workaround. How do I solve that without using the "inline" keyword? If that's not possible, why?
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Check if user is using IE
...JavaScript method :
function msieversion()
{
var ua = window.navigator.userAgent;
var msie = ua.indexOf("MSIE ");
if (msie > 0) // If Internet Explorer, return version number
{
alert(parseInt(ua.substring(msie + 5, ua.indexOf(".", msie))));
}
else // If anothe...
npm check and update package if needed
We need to integrate Karma test runner into TeamCity and for that I'd like to give sys-engineers small script (powershell or whatever) that would:
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How to test code dependent on environment variables using JUnit?
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The library System Lambda has a method withEnvironmentVariables for setting environment variables.
public void EnvironmentVariablesTest {
@Test
public void setEnvironmentVariable() {
String value = withEnvironmentVariable("name", "value")
.execute(() -> System.getenv("name...
How to dismiss keyboard iOS programmatically when pressing return
...I was able to get the screen touch to dismiss, but pressing return is not working.
21 Answers
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How can I check if a command exists in a shell script? [duplicate]
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In general, that depends on your shell, but if you use bash, zsh, ksh or sh (as provided by dash), the following should work:
if ! type "$foobar_command_name" > /dev/null; then
# install foobar here
fi
For a real installation script, you'd probably want to be sure that type doesn't retu...
How to dismiss a Twitter Bootstrap popover by clicking outside?
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Update: A slightly more robust solution: http://jsfiddle.net/mattdlockyer/C5GBU/72/
For buttons containing text only:
$('body').on('click', function (e) {
//did not click a popover toggle or popover
if ($(e.target).data('toggle') !== '...
Extracting just Month and Year separately from Pandas Datetime column
...ivalDate']).year
df['month'] = pd.DatetimeIndex(df['ArrivalDate']).month
or...
df['year'] = df['ArrivalDate'].dt.year
df['month'] = df['ArrivalDate'].dt.month
Then you can combine them or work with them just as they are.
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How to check if a variable is a dictionary in Python?
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You could use if type(ele) is dict or use isinstance(ele, dict) which would work if you had subclassed dict:
d = {'abc':'abc','def':{'ghi':'ghi','jkl':'jkl'}}
for ele in d.values():
if isinstance(ele,dict):
for k, v in ele.items():
prin...