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Efficiently test if a port is open on Linux?
... to connect by loopback. If it fails, then the port is closed or we aren't allowed access. Afterwards, close the connection.
Modify this for your use case, such as sending an email, exiting the script on failure, or starting the required service.
...
How to loop through files matching wildcard in batch file
... search, then this modifier expands to the
empty string
https://ss64.com/nt/syntax-args.html
In the above examples %I and PATH can be replaced by other valid
values. The %~ syntax is terminated by a valid FOR variable name.
Picking upper case variable names like %I make...
Find Java classes implementing an interface [duplicate]
...ncludeFilter(tf);
s.scan("package.you.want1", "package.you.want2");
String[] beans = bdr.getBeanDefinitionNames();
N.B. The TypeFilter is important if you want the correct results!
You can also use exclusion filters here instead.
The Scanner can be found in the spring-context jar, the regi...
How to declare and add items to an array in Python?
...also do this:
array = []
array += [valueToBeInserted]
If it's a list of strings, this will also work:
array += 'string'
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String variable interpolation Java [duplicate]
String building in Java confounds me. I abhore doing things like:
5 Answers
5
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Is it possible to change only the alpha of a rgba background colour on hover?
...solute on the <div> tag
Option 1: ::before psuedo-element:
.before_method{
position:relative;
}
.before_method:before{
display:block;
content:" ";
position:absolute;
z-index:-1;
background:rgb(18, 176, 41);
top:0;
left:0;
right:0;
bottom:0;
opacity:0.5;
}
.before_metho...
How can I save an image to the camera roll?
...ss the photo library:
<key>NSCameraUsageDescription</key>
<string>Enable camera access to take photos.</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>Enable photo library access to select a photo from your library.</string>
<key>NSPh...
Modify UIImage renderingMode from a storyboard/xib file
...er it's used rather than just in one interface builder file, but in almost all cases (that I've encountered) this is the behavior you want.
A few things to note:
The image color will not appear to have changed in interface builder (as of Xcode 6.1.1) but will work when the application is run.
I...
java : convert float to String and String to float
How could I convert from float to string or string to float?
9 Answers
9
...
How do you unit test a Celery task?
...def add(x, y):
return x + y
And your test:
from nose.tools import eq_
def test_add_task():
rst = add.apply(args=(4, 4)).get()
eq_(rst, 8)
Hope that helps!
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