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How to get first character of string?
...og(str.substring(0,1));
Alternative : string[index]
A string is an array of caract. So you can get the first caract like the first cell of an array.
Return the caract at the index index of the string
var str = "Stack overflow";
console.log(str[0]);
...
When to use IList and when to use List
...IList<T>.
Incidentally, I now almost always declare one-dimensional arrays as IList<T>, which means I can consistently use the IList<T>.Count property rather than Array.Length. For example:
public interface IMyApi
{
IList<int> GetReadOnlyValues();
}
public class MyApi...
How do I convert Long to byte[] and back in java
... ByteBuffer.allocate(Long.BYTES);
buffer.putLong(x);
return buffer.array();
}
public long bytesToLong(byte[] bytes) {
ByteBuffer buffer = ByteBuffer.allocate(Long.BYTES);
buffer.put(bytes);
buffer.flip();//need flip
return buffer.getLong();
}
Or wrapped in a class to avoi...
Javascript call() & apply() vs bind()?
...Smith says hello world"
apply is similar to call except that it takes an array-like object instead of listing the arguments out one at a time:
function personContainer() {
var person = {
name: "James Smith",
hello: function() {
console.log(this.name + " says hello " + argumen...
How to fluently build JSON in Java?
... //12. End nested object and return to the parent builder
.addArray("arrayKey") //13. Add an array to the object
.addObject() //14. Add a nested object to the array
.end() //15. End th...
How to get the current loop index when using Iterator?
...ListIterator worked. Similar to the test above:
List<String> list = Arrays.asList("zero", "one", "two");
ListIterator iter = list.listIterator();
while (iter.hasNext()) {
System.out.println("index: " + iter.nextIndex() + " value: " + iter.next());
}
Make sure you call the nextIndex BE...
ElasticSearch: Unassigned Shards, how to fix?
... r (',' (code 44)): expected a valid value (number, String, array, object, 'true' , 'false' or 'null')\n at [Source: [B@3b1fadfb; line: 6, column: 27]]","status": 500} <br> what should i do to fix it
...
PHPDoc type hinting for array of objects?
...rt better syntax! (hint: @var Object[] $objects says that "$objects" is an array of instances of Object.)
– Thom Porter
Aug 30 '13 at 9:49
10
...
PHP Regex to get youtube video ID?
...o accomplish, use those.)
parse_url takes a string and cuts it up into an array that has a bunch of info. You can work with this array, or you can specify the one item you want as a second argument. In this case we're interested in the query, which is PHP_URL_QUERY.
Now we have the query, which is...
Why is MATLAB so fast in matrix multiplication?
...Toolbox on a machine with a Tesla C2070:
>> A = rand(1024); gA = gpuArray(A);
% warm up by executing the operations a couple of times, and then:
>> tic, C = A * A; toc
Elapsed time is 0.075396 seconds.
>> tic, gC = gA * gA; toc
Elapsed time is 0.008621 seconds.
MATLAB uses highl...