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How to reverse a singly linked list using only two pointers?
...
Any alternative? No, this is as simple as it gets, and there's no fundamentally-different way of doing it. This algorithm is already O(n) time, and you can't get any faster than that, as you must modify every node.
It looks lik...
Programmatically find the number of cores on a machine
...
C++11
#include <thread>
//may return 0 when not able to detect
const auto processor_count = std::thread::hardware_concurrency();
Reference: std::thread::hardware_concurrency
In C++ prior to C++11, there's no portable way. Instea...
Can I do a synchronous request with volley?
...ynchronous JSON HTTP GET request, you can do the following:
RequestFuture<JSONObject> future = RequestFuture.newFuture();
JsonObjectRequest request = new JsonObjectRequest(URL, new JSONObject(), future, future);
requestQueue.add(request);
try {
JSONObject response = future.get(); // this w...
What's the difference between django OneToOneField and ForeignKey?
...i')
>>> e = Engine.objects.get(name='Diesel')
>>> e.car
<Car: Audi>
ForeignKey with unique=True Example
>>> from testapp.models import Car2, Engine2
>>> c2 = Car2.objects.get(name='Mazda')
>>> e2 = Engine2.objects.get(name='Wankel')
>>> ...
delegate keyword vs. lambda notation
...sion types and using expression trees in C#?
– MojoFilter
Nov 18 '08 at 18:53
2
Even longer answe...
Is there a unique Android device ID?
...ID deviceUuid = new UUID(androidId.hashCode(), ((long)tmDevice.hashCode() << 32) | tmSerial.hashCode());
String deviceId = deviceUuid.toString();
might result in something like: 00000000-54b3-e7c7-0000-000046bffd97
It works well enough for me.
As Richard mentions below, don't forget that you ...
Is there a way to make a DIV unselectable?
...on in jQuery. You can invoke it through $('.button').disableSelection();
Alternately, using CSS (cross-browser):
.button {
user-select: none;
-moz-user-select: none;
-khtml-user-select: none;
-webkit-user-select: none;
-o-user-select: none;
}
...
Compare two files line by line and generate the difference in another file
...ort them first. This can be done with a temporary file, or...
comm -2 -3 <(sort file1) <(sort file2) > file3
provided that your shell supports process substitution (bash does).
share
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i...
java.lang.OutOfMemoryError: GC overhead limit exceeded [duplicate]
...ndroid {
compileSdkVersion 23
buildToolsVersion '23.0.1'
defaultConfig {
applicationId "yourpackage"
minSdkVersion 14
targetSdkVersion 23
versionCode 1
versionName "1.0"
multiDexEnabled true
}
buildTypes {
release {
...
Importing data from a JSON file into R
...n package:
install.packages("rjson")
Then:
library("rjson")
json_file <- "http://api.worldbank.org/country?per_page=10&region=OED&lendingtype=LNX&format=json"
json_data <- fromJSON(paste(readLines(json_file), collapse=""))
Update: since version 0.2.1
json_data <- fromJSON...