大约有 15,211 项符合查询结果（耗时：0.0251秒） [XML]
How to print to console when using Qt
...bug() etc actually do, this will be by far the superior answer (IMO it's already superior since OP is asking for something to replace std::cout, but 40ish voters appear not to agree).
– Kyle Strand
Mar 9 '15 at 21:00
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How to implement the Android ActionBar back button?
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Selvin already posted the right answer. Here, the solution in pretty code:
public class ServicesViewActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstan...
How can I measure the similarity between two images? [closed]
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Use a normalised colour histogram. (Read the section on applications here), they are commonly used in image retrieval/matching systems and are a standard way of matching images that is very reliable, relatively fast and very easy to implement.
Essentially a co...
How to implement an abstract class in ruby?
... Very important point. So often we tend to get blindsided by stuff that we read or hear, instead of thinking "what is the pragmatic approach in this case". It's seldom completely black or white.
– Per Lundberg
Aug 14 '17 at 8:15
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How to see the changes between two commits without commits in-between?
...ommits - in other words, diffing the output from two diffs. This involves reading and comparing two input streams. diff (GNU, or Unix, diff) can do that, while git diff cannot. Some may wonder why one would want to do that. I am in the middle of doing that right now, cleaning up a merge that went...
How is an overloaded method chosen when a parameter is the literal null value?
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I never read that thing. But I did do some Java this summer and you can overload a method taking an Object with a method taking a Void object.
– xavierm02
Oct 23 '12 at 17:12
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Run batch file as a Windows service
...ervice had run the .bat successfully. Haven't dug into this yet but this thread experienced the same thing and solved it using nssm to install the service.
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Password masking console application
...e:
var pass = string.Empty;
ConsoleKey key;
do
{
var keyInfo = Console.ReadKey(intercept: true);
key = keyInfo.Key;
if (key == ConsoleKey.Backspace && pass.Length > 0)
{
Console.Write("\b \b");
pass = pass[0..^1];
}
else if (!char.IsControl(keyInfo...
Preview an image before it is uploaded
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Please take a look at the sample code below:
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function(e) {
$('#blah').attr('src', e.target.result);
}
reader.readAsData...
What is the proper way to display the full InnerException?
...o it. Obviously, a full stack trace is usually a messy overkill, but only reading the inner exception is the other extreme. user3016982's answer is far better. You get every exception message in the stack without the nasty trace.
– JamesHoux
Aug 3 '18 at 14:...