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Most concise way to convert a Set to a List
...h, sort, etc. I get a NullPointerException, however when I expect my list none of the elements are null, and the only weird I notice is that the index starts at 1. However, if I just create a normal list the index starts at 0. Weird?
– Jack
Feb 19 '16 at 15:04
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Convert pem key to ssh-rsa format
...e "Extract the public key from the PEM formatted RSA pair", point 2): once one has the certificate in pem format: ssh-keygen -y -f dummy-xxx.pem produces an ssh-rsa AAAA[...]== fit for ssh's authorized_keys file.
– Thomas
Feb 9 '17 at 14:54
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ActiveRecord, has_many :through, and Polymorphic Associations
...er how to do this the first time I encountered it. Didn't help that it was one of the first things I tried to do in Rails that didn't involve following a tutorial/book.
– EmFi
Nov 6 '09 at 17:28
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Test if characters are in a string
...bove, the needle we are searching for 1+2, when treated as a regex, means "one or more 1 followed by a 2"... but ours is followed by a plus!
So, if you used the grepl without setting fixed, your needles would accidentally be haystacks, and that would accidentally work quite often, we can see it e...
EF Code First: How do I see 'EntityValidationErrors' property from the nuget package console?
... This function would simply enumerate the errors within the EntityValidationErrors collection, and rethrow an exception where the Exception message lists the individual problems. This makes the output show up in the NuGet package manager console.
Code follows:
/// <summary>
/// Wrapper for...
How can I detect whether an iframe is loaded?
...button id='click'>click me</button>
<iframe style="display:none" id='MainPopupIframe' src='' /></iframe>
jsfiddle DEMO.
Update: Using plain javascript
window.onload=function(){
var ifr=document.getElementById('MainPopupIframe');
ifr.onload=function(){
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What does a double * (splat) operator do
...his is quite a common pattern: You accept a list of arguments and the last one is an options hash, which can be extract - for example - using ActiveSupport's extract_options!.
In Ruby 2.0 you can simplify these methods:
def cycle(first_value, *values, **options)
# Same code as above without furt...
How to output a comma delimited list in jinja python template?
...rked pretty well for me, without leaving a trailing comma. Thanks for this one!
– Daniel Andrei Mincă
Dec 19 '17 at 12:49
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How to put a unicode character in XAML?
... <TextBlock Name="test" FontFamily="pack://application:,,,/Y_Yoga;Component/Resources/#FontAwesome">&#xF04B;</TextBlock>
</Button>
Hope to be helpful!
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HttpServletRequest - how to obtain the referring URL?
... upvote anyway for HttpHeaders reference. Apache HTTP is another good one: org.apache.http.HttpHeaders
– Barett
Jan 5 '15 at 19:53
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