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Sending a message to nil in Objective-C
... out all of the elements in an ArrayList:
void foo(ArrayList list)
{
for(int i = 0; i < list.size(); ++i){
System.out.println(list.get(i).toString());
}
}
Now, if you call that method like so: someObject.foo(NULL); you're going to probably get a NullPointerException when it tri...
How to extract the first two characters of a string in shell scripting?
For example, given:
14 Answers
14
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Convert Iterable to Stream using Java 8 JDK
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There's a much better answer than using spliteratorUnknownSize directly, which is both easier and gets a better result. Iterable has a spliterator() method, so you should just use that to get your spliterator. In the worst case, it's the same code (the default implementat...
How to compare objects by multiple fields
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You can implement a Comparator which compares two Person objects, and you can examine as many of the fields as you like. You can put in a variable in your comparator that tells it which field to compare to, although it would probably be simpler to just ...
What open source C++ static analysis tools are available? [closed]
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Oink is a tool built on top of the Elsa C++ front-end. Mozilla's Pork is a fork of Elsa/Oink.
See: http://danielwilkerson.com/oink/index.html
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Rails: Is there a rails trick to adding commas to large numbers?
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You want the number_with_delimiter method. For example:
<%= number_with_delimiter(@number, :delimiter => ',') %>
Alternatively, you can use the number_with_precision method to ensure that the number is always displayed with two decimal places of precision:
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Create an array with same element repeated multiple times
... array each iteration. Like this (shown just as an example of how you can work with arrays):
function fillArray(value, len) {
var arr = [];
for (var i = 0; i < len; i++) {
arr.push(value);
}
return arr;
}
sh...
user authentication libraries for node.js?
Are there any existing user authentication libraries for node.js? In particular I'm looking for something that can do password authentication for a user (using a custom backend auth DB), and associate that user with a session.
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What is this Javascript “require”?
...ation in one file. This concept is also present in other languages with minor differences in syntax and behavior, like C's include, Python's import, and so on.
One big difference between Node.js modules and browser JavaScript is how one script's code is accessed from another script's code.
In bro...
Boolean Field in Oracle
Yesterday I wanted to add a boolean field to an Oracle table. However, there isn't actually a boolean data type in Oracle. Does anyone here know the best way to simulate a boolean? Googling the subject discovered several approaches
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