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Running Command Line in Java [duplicate]
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Runtime rt = Runtime.getRuntime();
Process pr = rt.exec("java -jar map.jar time.rel test.txt debug");
http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html
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Are Exceptions in C++ really slow
...ts) is the Zero-Cost model exceptions.
The idea is that instead of losing time by setting up a guard and explicitly checking for the presence of exceptions everywhere, the compiler generates a side table that maps any point that may throw an exception (Program Counter) to the a list of handlers. Wh...
How to initialize HashSet values by construction?
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There is a shorthand that I use that is not very time efficient, but fits on a single line:
Set<String> h = new HashSet<>(Arrays.asList("a", "b"));
Again, this is not time efficient since you are constructing an array, converting to a list and using that list...
Compare two List objects for equality, ignoring order [duplicate]
...> t))
Edit:
Here is a solution that performs a bit better (about ten times faster), and only requires IEquatable, not IComparable:
public static bool ScrambledEquals<T>(IEnumerable<T> list1, IEnumerable<T> list2) {
var cnt = new Dictionary<T, int>();
foreach (T s i...
Why can't I have “public static const string S = ”stuff"; in my Class?
...lly more flexible than Java's final for variables - you can set it as many times as you like in the constructor, but not elsewhere. That can be very handy.
– Jon Skeet
Jan 2 '09 at 23:01
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Get final URL after curl is redirected
...not what the question included and risk changing what the server does. Sometimes servers don't respond well to HEAD even when they respond fine to GET.
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Duplicate log output when using Python logging module
...gger() is already a singleton. (Documentation)
The problem is that every time you call myLogger(), it's adding another handler to the instance, which causes the duplicate logs.
Perhaps something like this?
import os
import time
import datetime
import logging
loggers = {}
def myLogger(name):
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Non-type template parameters
...se non-constant expressions can't be parsed and substituted during compile-time. They could change during runtime, which would require the generation of a new template during runtime, which isn't possible because templates are a compile-time concept.
Here's what the standard allows for non-type temp...
Best way for a 'forgot password' implementation? [closed]
...ering the email address instead of the username, because usernames are sometimes forgotten too.
The system has a table password_change_requests with the columns ID, Time and UserID. When the new user presses the button, a record is created in the table. The Time column contains the time when the use...
What are the downsides to using Dependency Injection? [closed]
...ners or approaches that perform type resolving generally incur a slight runtime penalty (very negligible, but it's there)
Generally, the benefit of decoupling makes each task simpler to read and understand, but increases the complexity of orchestrating the more complex tasks.
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