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/etc/apt/sources.list" E212: Can't open file for writing
...udo vim FILE. Or if you don't want to leave your existing vim session (and now have proper sudo rights), you can issue:
:w !sudo tee % > /dev/null
Which will save the file.
HTH
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improv...
C++ equivalent of java's instanceof
...seClass>(ptr)) { ... }
However, this purely operates on the types as known by the compiler.
Edit:
This code should work for polymorphic pointers:
template<typename Base, typename T>
inline bool instanceof(const T *ptr) {
return dynamic_cast<const Base*>(ptr) != nullptr;
}
E...
Changing the Git remote 'push to' default
... tried git branch --set-upstream-to myfork and got an error: >error: unknown option `set-upstream-to' I'm running git 1.7.9
– alonisser
Sep 15 '13 at 21:17
...
Bootstrap 3 Glyphicons are not working
...urs of effort, and almost rage quitting my career, I found this answer and now I have working glyphicons again. Thank you!!
– dohpaz42
Oct 24 '15 at 18:22
2
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Java Date vs Calendar
... as java.util.Date, java.util.Calendar, and java.text.SimpleDateFormat are now legacy, supplanted by the java.time classes built into Java 8 and later. See Tutorial by Oracle.
– Basil Bourque
Oct 19 '18 at 19:51
...
Visually managing MongoDB documents and collections [closed]
...ma and perform ad-hoc find queries against the database – all with zero knowledge of MongoDB's query language. Developed by MongoDB, Inc. No update queries or access to the shell.
Studio 3T, formerly MongoChef – a multi-platform in-place data browser and editor desktop GUI for MongoDB (Core vers...
How can I force a hard reload in Chrome for Android
...
Now its changed to Clear Browsing Data, where you can check clear cache using check box.
– shaijut
Dec 3 '15 at 7:39
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What is the documents directory (NSDocumentDirectory)?
...ch with @"~/Documents". Hardcoding paths is never a good idea. It may work now, but if Apple ever chooses to rename or move the Documents directory, your app will break. NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); will always give you the correct directory!
...
How to listen for changes to a MongoDB collection?
... Replica Set, all of the MongoDB actions are logged to an operations log (known as the oplog). The oplog is basically just a running list of the modifications made to the data. Replicas Sets function by listening to changes on this oplog and then applying the changes locally.
Does this sound famil...
How do I run multiple instances of Android Studio
...ings -> Project Opening.
Check [x] "Confirm window to open project in".
Now open the other (2nd) project with File -> Open... etc.
You will now be asked if you want to open a new window or replace what you already have. Select New Window.
Screenshots:
Older versions:
Go to Setting...