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How to use sed to remove the last n lines of a file
...doing inplace edit, file is now 2173 lines!
If you want to save it into a new file, the code is:
sed -i '2174,$d' file > outputfile
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Remove empty lines in text using Visual Studio
...into the following in VS 2012:
Remove single blank lines
Old:
^:b*$\n
New:
^(?([^\r\n])\s)*\r?$\r?\n
Visual Studio 2013 (thanks to BozoJoe and Joe Johnston):
^\s*$\n
Remove double blank lines
Old:
^:b*\n:b*\n
New:
^(?([^\r\n])\s)*\r?\n(?([^\r\n])\s)*\r?\n
Rolls right off your tongu...
Difference Between One-to-Many, Many-to-One and Many-to-Many?
...emoval = true
)
private List<PostComment> comments = new ArrayList<>();
//Constructors, getters and setters removed for brevity
public void addComment(PostComment comment) {
comments.add(comment);
comment.setPost(this);
...
API to automatically upload apk to Google Play? [closed]
...
As of today there is a new official publishing API That allows you to upload to any channel (ie. alpha, beta...) or update title and description and more.
From the docs:
Uploading new versions of an app Releasing apps, by assigning APKs to...
No IUserTokenProvider is registered
...taProtection;
using Microsoft.AspNet.Identity.Owin;
// ...
var provider = new DpapiDataProtectionProvider("SampleAppName");
var userManager = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>());
userManager.UserTokenProvider = new DataProtectorTokenProvider<Applicati...
Add property to anonymous type after creation
...ect routeValues)
{
RouteValueDictionary routeValueDictionary = new RouteValueDictionary(routeValues);
// Add more parameters
foreach (string parameter in helper.ViewContext.RequestContext.HttpContext.Request.QueryString.AllKeys)
{
routeValueDictionary...
HTTP redirect: 301 (permanent) vs. 302 (temporary)
...
Status 301 means that the resource (page) is moved permanently to a new location. The client/browser should not attempt to request the original location but use the new location from now on.
Status 302 means that the resource is temporarily located somewhere else, and the client/browser shou...
Blocks on Swift (animateWithDuration:animations:completion:)
...lf.blurBg.alpha = 1
}, completion: {
(value: Bool) in
self.blurBg.hidden = true
})
The important part here is the (value: Bool) in. That tells the compiler that this closure takes a Bool labeled 'value' and returns void.
For reference, if you wanted to write a closure that returned a bool...
Adding n hours to a date in Java?
...Calendar cal = Calendar.getInstance(); // creates calendar
cal.setTime(new Date()); // sets calendar time/date
cal.add(Calendar.HOUR_OF_DAY, 1); // adds one hour
cal.getTime(); // returns new date object, one hour in the future
Check API for more.
...
JUnit test for System.out.println()
... System.setXXX is simple:
private final ByteArrayOutputStream outContent = new ByteArrayOutputStream();
private final ByteArrayOutputStream errContent = new ByteArrayOutputStream();
private final PrintStream originalOut = System.out;
private final PrintStream originalErr = System.err;
@Before
publi...