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Find a pair of elements from an array whose sum equals a given number
... java.util.HashMap;
public class ArrayPairSum {
public static void main(String[] args) {
int []a = {2,45,7,3,5,1,8,9};
printSumPairs(a,10);
}
public static void printSumPairs(int []input, int k){
Map<Integer, Integer> pairs = new HashMap<Integer, Integer&g...
jQuery scroll to element
... individual element 100 pixels down
Options:
scrollTarget: A element, string, or number which indicates desired scroll position.
offsetTop: A number that defines additional spacing above scroll target.
duration: A string or number determining how long the animation will run.
easing: A string...
What's the difference between echo, print, and print_r in PHP?
... are more or less the same; they are both language constructs that display strings. The differences are subtle: print has a return value of 1 so it can be used in expressions whereas echo has a void return type; echo can take multiple parameters, although such usage is rare; echo is slightly faster ...
Most efficient way to check for DBNull and then assign to a variable?
...o extension methods:
public static T? GetValue<T>(this DataRow row, string columnName) where T : struct
{
if (row.IsNull(columnName))
return null;
return row[columnName] as T?;
}
public static string GetText(this DataRow row, string columnName)
{
if (row.IsNull(columnNam...
How do I decode HTML entities in Swift?
I am pulling a JSON file from a site and one of the strings received is:
23 Answers
23...
Array versus linked-list
...nefit from
the cache.
Another disadvantage of linked lists
is the extra storage needed for
references, which often makes them
impractical for lists of small data
items such as characters or boolean
values. It can also be slow, and with
a naïve allocator, wasteful, to
allocate m...
Calculate the median of a billion numbers
...AM of some smartphones.
public class Median {
public static void main(String[] args) {
long start = System.currentTimeMillis();
int[] numbers = new int[1_000_000_000];
System.out.println("created array after " + (System.currentTimeMillis() - start) + " ms");
...
How to set timeout for http.Get() requests in Golang?
...r timeout = time.Duration(2 * time.Second)
func dialTimeout(network, addr string) (net.Conn, error) {
return net.DialTimeout(network, addr, timeout)
}
func main() {
transport := http.Transport{
Dial: dialTimeout,
}
client := http.Client{
Transport: &transport,
...
Export and Import all MySQL databases at one time
...
@jruzafa You can use -Bse "show databases" to avoid extra formatting output and thus you can remove | tr -d "| " | grep -v Database. In my export script this line is databases=`mysql -u $USER -p$PASSWORD -Bse "SHOW DATABASES;"
– miquel
No...
MongoDB: Is it possible to make a case-insensitive query?
...
Especially if you're interpolating a string ({foo: /#{x}/i}) that could have a question mark in it..
– Peter Ehrlich
Dec 16 '11 at 18:53
17
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