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Efficient evaluation of a function at every cell of a NumPy array
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I am afraid that the vectorized function cannot be faster than the "manual" double loop iteration and assignment through all the array elements. Especially, because it stores the result to a newly created variable (and not directly to the initial input). Thanks a lo...
What is the difference between “long”, “long long”, “long int”, and “long long int” in C++?
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long and long int are identical. So are long long and long long int. In both cases, the int is optional.
As to the difference between the two sets, the C++ standard mandates minimum ranges for each, and that long long is at least as wide as long.
The ...
How to Customize a Progress Bar In Android
...set the progressDrawable property in customprogressbar.xml (drawable)
You can do this in the XML file or in the Activity (at run time).
Do the following in your XML:
<ProgressBar
android:id="@+id/progressBar1"
style="?android:attr/progressBarStyleHorizontal"
android:progressDrawabl...
Conditional Variable vs Semaphore
...e that a piece of code is atomic, put a lock around it. You could theoretically use a binary semaphore to do this, but that's a special case.
Semaphores and condition variables build on top of the mutual exclusion provide by locks and are used for providing synchronized access to shared resources....
Symbolicating iPhone App Crash Reports
I'm looking to try and symbolicate my iPhone app's crash reports.
25 Answers
25
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CSS z-index paradox flower
I would like to create a paradoxical effect via the z-index CSS property.
6 Answers
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When should I use the new keyword in C++?
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Method 1 (using new)
Allocates memory for the object on the free store (This is frequently the same thing as the heap)
Requires you to explicitly delete your object later. (If you don't delete it, you could create a memory leak)
Memory stays alloca...
Why does modern Perl avoid UTF-8 by default?
...din, stdout, and stderr to UTF‑8. Both these are global effects, not lexical ones.
At the top of your source file (program, module, library, dohickey), prominently assert that you are running perl version 5.12 or better via:
use v5.12; # minimal for unicode string feature
use v5.14; # optimal f...
What is the difference between `sorted(list)` vs `list.sort()`?
...iterable, not a list yet.
For lists, list.sort() is faster than sorted() because it doesn't have to create a copy. For any other iterable, you have no choice.
No, you cannot retrieve the original positions. Once you called list.sort() the original order is gone.
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App Inventor 2 UrsPahoMqttClient 拓展 - 物联网轻量级MQTT协议 · App Inventor 2 中文网
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使用服务器在建立连接时传输的 CA 签名证书。
TrustedCertFile - 受信任的证书文件
可选：受信任的证书文件的名称。
TruststoreFile - 信任库文件
可选：信任库文件的名称。
TruststorePassword - 信...