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How to trace the path in a Breadth-First Search?
...aths you found, then continue instead of return. If you're using a visited set to prevent cycles, don't add your end node to the visited set ever (otherwise only one path can ever have that ending node).
– Dominic K
Jun 26 '15 at 0:21
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Search for executable files using find command
...ype f -perm +111 -print
In this context "+" means "any of these bits are set" and 111 is the execute bits.
Note that this is not identical to the -executable predicate in GNU find. In particular, -executable tests that the file can be executed by the current user, while -perm +111 just tests if a...
How do I get the path of a process in Unix / Linux
...e's a suitable executable binary with the same name.
Note that argv[0] is set by the process that execs the program, so it is not 100% reliable.
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What happens to a declared, uninitialized variable in C? Does it have a value?
... older architectures.
Attempting to work with a value with these flag bits set can result in a CPU exception in an operation that really shouldn't fail (eg, integer addition, or assigning to another variable). And if you go and leave a variable uninitialized, the compiler might pick up some random g...
How to map with index in Ruby?
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If you're using ruby 1.8.7 or 1.9, you can use the fact that iterator methods like each_with_index, when called without a block, return an Enumerator object, which you can call Enumerable methods like map on. So you can do:
a...
How to prevent moment.js from loading locales with webpack?
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When you set resolve aliases, they apply to any usage of import or require in your system (including libraries you depend on). So if a module you depend on required moment, you would be changing the result for that module as well. Thi...
Converting bool to text in C++
...rt a boolean value to a string such that 1 turns to "true" and 0 turns to "false"? I could just use an if statement, but it would be nice to know if there is a way to do that with the language or standard libraries. Plus, I'm a pedant. :)
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map function for objects (instead of arrays)
...r
{ a : 1, b: 4, c: 9 }
NB: this version also allows you to (optionally) set the this context for the callback, just like the Array method.
EDIT - changed to remove use of Object.prototype, to ensure that it doesn't clash with any existing property named map on the object.
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How can I format a String number to have commas and round?
...d here. You call it like this:
public static void main(String[])
{
int settings = ValueFormat.COMMAS | ValueFormat.PRECISION(2) | ValueFormat.MILLIONS;
String formatted = ValueFormat.format(1234567, settings);
}
I should also point out this doesn't handle decimal support, but is very useful...
How can I get `find` to ignore .svn directories?
...@Kaleb: As comparing the file type (equivalent to testing whether a bit is set in an integer) is faster than comparing the filename (equivalent to a string comparison, which is O(n)), putting -type d before -name .svn is theoretically more efficient. However, it is usually insignificant except if yo...