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When to use an assertion and when to use an exception
...nning, but an exception would let the program continue running.
Note that if(group != null) is not an assertion, that is just a conditional.
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How can I rename a field for all documents in MongoDB?
...ll your records.
Or you can use the former way:
remap = function (x) {
if (x.additional){
db.foo.update({_id:x._id}, {$set:{"name.last":x.name.additional}, $unset:{"name.additional":1}});
}
}
db.foo.find().forEach(remap);
In MongoDB 3.2 you can also use
db.students.updateMany( {}, { $r...
What are App Domains in Facebook Apps?
...
What if I develop an iOS or Android app instead of a website? What domain should I put in that case? My API domain or what?
– Fancy John
Mar 11 '18 at 5:45
...
Make the current commit the only (initial) commit in a Git repository?
...lso removes the configuration of the repository.
Note: This does NOT work if the repository has submodules! If you are using submodules, you should use e.g. interactive rebase
Step 1: remove all history (Make sure you have backup, this cannot be reverted)
cat .git/config # note <github-uri>...
How to update a value, given a key in a hashmap?
...
Java 8 way:
You can use computeIfPresent method and supply it a mapping function, which will be called to compute a new value based on existing one.
For example,
Map<String, Integer> words = new HashMap<>();
words.put("hello", 3);
words.put("...
This version of the application is not configured for billing through Google Play
...st of requirements for the Google IAB testing.
Prerequisites:
AndroidManifest must include "com.android.vending.BILLING" permission.
APK is built in release mode.
APK is signed with the release certificate(s). (Important: with "App Signing by Google Play" it only works if you download directly fr...
Does a C# app track how long its been running?
And if it does, is there an easy way to get the total time since it started?
3 Answers
...
How to reuse an ostringstream?
...lt;< "hello";
s.seekp(0);
s << "b";
assert(s.str() == "bello");
If you want to use the string for c-functions, you can use std::ends, putting a terminating null like this:
std::ostringstream s;
s << "hello";
s.seekp(0);
s << "b" << std::ends;
assert(s.str().size() == 5 ...
Difference between 'python setup.py install' and 'pip install'
...utomatically download all dependencies for a package for you. In contrast, if you use setup.py, you often have to manually search out and download dependencies, which is tedious and can become frustrating.
pip keeps track of various metadata that lets you easily uninstall and update packages with a ...
Get absolute path of initially run script
I have searched high and low and get a lot of different solutions and variables containing info to get the absolute path. But they seem to work under some conditions and not under others. Is there one silver bullet way to get the absolute path of the executed script in PHP? For me, the script wil...