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What happens to C# Dictionary lookup if the key does not exist?
...esponding value
}
else
{
// Key wasn't in dictionary; "value" is now 0
}
(Using ContainsKey and then the the indexer makes it look the key up twice, which is pretty pointless.)
Note that even if you were using reference types, checking for null wouldn't work - the indexer for Dictionary<...
Should I use string.isEmpty() or “”.equals(string)?
...
answered Jul 23 '10 at 19:10
Michael MrozekMichael Mrozek
141k2424 gold badges151151 silver badges159159 bronze badges
...
Should I use Java's String.format() if performance is important?
...ass StringTest{
public static void main( String[] args ){
int i = 0;
long prev_time = System.currentTimeMillis();
long time;
for( i = 0; i< 100000; i++){
String s = "Blah" + i + "Blah";
}
time = System.currentTimeMillis() - prev_time;
System.out.println(...
Difference between case object and object
...
109
Case classes differ from regular classes in that they get:
pattern matching support
default i...
In the shell, what does “ 2>&1 ” mean?
... |
edited May 9 '18 at 20:18
Ricardo
2,45811 gold badge2121 silver badges4141 bronze badges
answered M...
What is the difference between sed and awk? [closed]
...(e.g. "(231.45)") using this (which has room for improvement):
sed 's/-\([0-9.]\+\)/(\1)/g' inputfile
I would use awk when the text looks more like rows and columns or, as awk refers to them "records" and "fields". If I was going to do a similar operation as above, but only on the third field in ...
How to get response status code from jQuery.ajax?
... get the HTTP response code from a jQuery.ajax call. Then, if the code is 301 (Moved Permanently), display the 'Location' response header:
...
Volley Android Networking Library
...
204
$ git clone https://android.googlesource.com/platform/frameworks/volley
$ cd volley
$ android u...
How to generate unique ID with node.js
...on generate(count, k) {
var _sym = 'abcdefghijklmnopqrstuvwxyz1234567890',
var str = '';
for(var i = 0; i < count; i++) {
str += _sym[parseInt(Math.random() * (_sym.length))];
}
base.getID(str, function(err, res) {
if(!res.length) {
k(str) ...