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When to use MongoDB or other document oriented database systems? [closed]
...t used MongoDB in production, but I have used it a little building a test app and it is a very cool piece of kit. It seems to be very performant and either has, or will have soon, fault tolerance and auto-sharding (aka it will scale). I think Mongo might be the closest thing to a RDBMS replacement t...
Easier way to debug a Windows service
...'s kind of cumbersome and I'm wondering if there is a more straightforward approach.
28 Answers
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How can I return to a parent activity correctly?
I have 2 activities (A and B) in my android application and I use an intent to get from activity A to activity B. The use of parent_activity is enabled:
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How to solve error message: “Failed to map the path '/'.”
...searched and searched on Google, and I can't find anything that even seems applicable to my situation, let alone solves the problem. It doesn't matter which address in my website I try to navigate to (even addresses that don't exist give this error instead of a 404), I get the exact same message (th...
Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?
Why would you create a "Implicitly Unwrapped Optional" vs creating just a regular variable or constant?
If you know that it can be successfully unwrapped then why create an optional in the first place?
For example, why is this:
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Start service in Android
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it's work for my apps on android sdk 26+ but dose not on android sdk 25 or lower. there have any solution ?
– Mahidul Islam
Mar 12 '18 at 7:29
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AppInventor2 解析json数据技巧 - App应用开发 - 清泛IT社区，为创新赋能！
{
"code": 0,
"data": [
{
"identifier": "CH4",
"time": 1762406563579,
"value": "6.9",
&qu...
如何实现for循环？？ - App应用开发 - 清泛IT社区，为创新赋能！
int main() { uint32_t val = 1; for (uint8_t i = 1; i <= 4; i++) { val *= 16; // 下一次就是 16^1, 16^2, ... } return 0;}这段程序，如何用代码块实现？？
How can I get screen resolution in java?
...nt (some systems use a little side monitor for real-time displays while an app is running in the background, and such a monitor can be identified by size, screen colors, etc.):
// Test if each monitor will support my app's window
// Iterate through each monitor and see what size each is
GraphicsEnv...
How do I verify that an Android apk is signed with a release certificate?
...; jdk < bin path in cmd prompt)
$ jarsigner -verify -verbose -certs my_application.apk
If you see "CN=Android Debug", this means the .apk was signed with the debug key generated by the Android SDK
(means it is unsigned), otherwise you will find something for CN.
For more details see: http://de...