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Histogram using gnuplot?
...x,width)=width*floor(x/width)
plot 'datafile' using (bin($1,binwidth)):(1.0) smooth freq with boxes
check out help smooth freq to see why the above makes a histogram
to deal with ranges just set the xrange variable.
share...
How do I use boolean variables in Perl?
...
In Perl, the following evaluate to false in conditionals:
0
'0'
undef
'' # Empty scalar
() # Empty list
('')
The rest are true. There are no barewords for true or false.
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Remove outline from select box in FF
...he color of the dotted border. So say if you do...
select {
color: rgba(0,0,0,0);
}
Firefox will render the dotted border transparent. But of course your text will be transparent too! So we must somehow display the text. text-shadow comes to the rescue:
select {
color: rgba(0,0,0,0);
text-...
Validate phone number with JavaScript
...alidates that the phone number is in one of these formats:
(123) 456-7890 or 123-456-7890
26 Answers
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C++ equivalent of java's instanceof
...
202
Try using:
if(NewType* v = dynamic_cast<NewType*>(old)) {
// old was safely casted to...
How to hide first section header in UITableView (grouped style)
...hat seems reasonably clean to me. So I'm answering my own question.
Since 0 as the first section header's height doesn't work, I return 1. Then I use the contentInset to hide that height underneath the navigation bar.
Objective-C:
- (CGFloat) tableView:(UITableView *)tableView heightForHeaderInSe...
Integrate ZXing in Android Studio
...ependencies {
implementation 'com.journeyapps:zxing-android-embedded:3.0.2@aar'
implementation 'com.google.zxing:core:3.2.0'
}
and Gradle does all the magic to compile the code and makes it accessible in your app.
To start the Scanner afterwards, use this class/method:
From the Activity:
...
Maven in Eclipse: step by step installation [closed]
I have spent been on the Maven site reading the 5- and 30-minute tutorials, and trialing Maven out for the first time.
13 A...
What does “fragment” mean in ANTLR?
...r:
NUMBER: DIGITS | OCTAL_DIGITS | HEX_DIGITS;
fragment DIGITS: '1'..'9' '0'..'9'*;
fragment OCTAL_DIGITS: '0' '0'..'7'+;
fragment HEX_DIGITS: '0x' ('0'..'9' | 'a'..'f' | 'A'..'F')+;
In this example, matching a NUMBER will always return a NUMBER to the lexer, regardless of if it matched "1234", "...
Why does struct alignment depend on whether a field type is primitive or user-defined?
...est = new RefAndTwoInt32Wrappers();
test.text = "adsf";
test.x.x = 0x11111111;
test.y.x = 0x22222222;
Console.ReadLine(); // <=== Breakpoint here
When the breakpoint hits, use Debug + Windows + Memory + Memory 1. Switch to 4-byte integers and put &test in the Address f...