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Rails Object to hash
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Don't use this when looping, Expensive method. Go with as_json
– AnkitG
Jul 10 '13 at 8:07
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How to exit if a command failed?
I am a noob in shell-scripting. I want to print a message and exit my script if a command fails. I've tried:
8 Answers
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Too many 'if' statements?
The following code does work how I need it to, but it's ugly, excessive or a number of other things. I've looked at formulas and attempted to write a few solutions, but I end up with a similar amount of statements.
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random.seed(): What does it do?
I am a bit confused on what random.seed() does in Python. For example, why does the below trials do what they do (consistently)?
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Why can't I make a vector of references?
...cept at boost.org/doc/libs/1_39_0/doc/html/Assignable.html all operations except the swap are valid on references.
– amit
Aug 18 '09 at 16:01
8
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Java generics type erasure: when and what happens?
...ut when generics are used, they're converted into compile-time checks and execution-time casts. So this code:
List<String> list = new ArrayList<String>();
list.add("Hi");
String x = list.get(0);
is compiled into
List list = new ArrayList();
list.add("Hi");
String x = (String) list.ge...
Can I write a CSS selector selecting elements NOT having a certain class or attribute?
...tor rule that selects all elements that don't have a certain class. For example, given the following HTML:
10 Answers
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What is a method that can be used to increment letters?
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Simple, direct solution
function nextChar(c) {
return String.fromCharCode(c.charCodeAt(0) + 1);
}
nextChar('a');
As others have noted, the drawback is it may not handle cases like the letter 'z' as expected. But it depends on what you want out of it. The...
What does the exclamation mark mean in a Haskell declaration?
...rn Haskell using a real project to drive it. I don't understand what the exclamation mark in front of each argument means and my books didn't seem to mention it.
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