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What is the difference between ~> and >= when specifying rubygem in Gemfile?
... version" though: when you supply one digit. You might expect "~> 4" to mean "Any version 4 or higher", but it doesn't, so be careful.
– hlascelles
Jun 11 '14 at 21:20
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What is the difference between trie and radix trie data structures?
...egory Radix Trie describes a particular category of Trie, but that doesn't mean that all tries are radix tries.
If they are[n't] same, then what is the meaning of Radix trie (aka Patricia Trie)?
I assume you meant to write aren't in your question, hence my correction.
Similarly, PATRICIA deno...
Difference between Observer, Pub/Sub, and Data Binding
...'s my take on the three:
Data Binding
Essentially, at the core this just means "the value of property X on object Y is semantically bound to the value of property A on object B. No assumptions are made as to how Y knows or is fed changes on object B.
Observer, or Observable/Observer
A design pat...
What is the difference between 0.0.0.0, 127.0.0.1 and localhost?
...t" to see how it resolves to 127.0.0.1.
0.0.0.0 has a couple of different meanings, but in this context, when a server is told to listen on 0.0.0.0 that means "listen on every available network interface". The loopback adapter with IP address 127.0.0.1 from the perspective of the server process lo...
Why does the C# compiler not fault code where a static method calls an instance method?
...etc., not static vs. non-static), and only then check for static. But that means that the static check has to wait until runtime. Hence the observed behavior.
Late addition: Some background on why they chose to do things this funny order can be inferred from this blog post by Eric Lippert.
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How to detect when facebook's FB.init is complete
...o authentication events.
In your case you are using "status: true" which means that FB object will request Facebook for user's login status.
FB.init({
appId : '<?php echo $conf['fb']['appid']; ?>',
status : true, // check login status
cookie : true, // enable cookies to allow t...
Selecting an element in iFrame jQuery
...ge have their tokenid-s. I need to select the elements by those tokenid-s. Means - I click on an element on the main page and select corresponding element in the page in the iFrame. With the help of jQuery I'm doing it in the following way:
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How do you disable browser Autocomplete on web form field / input tag?
... to disable autocomplete on behalf of your users is not a good idea. This means I would only disable autocomplete in very specific situations, such as when you plan to build your own autocomplete functionality and don't want conflicts or strange behavior.
– macguru2000
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pinpointing “conditional jump or move depends on uninitialized value(s)” valgrind message
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What this means is that you are trying to print out/output a value which is at least partially uninitialized. Can you narrow it down so that you know exactly what value that is? After that, trace through your code to see where it is be...
How to use a different version of python during NPM install?
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Sure, if python2 is on your $PATH, use that, by all means :-)
– ack
Oct 4 '14 at 23:54
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