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将 App Inventor 2 项目连接到外部传感器 · App Inventor 2 中文网
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Introduction
App Inventor is a visual “blocks” based language for programming Android apps. It gives users the ability to easily learn, create, and prototype in a plug-and-play environment by connecting various blocks of code.
Currently, AppInventor’s toolset primarily...
Word wrapping in phpstorm
...hat are wrapped by the editor.
This plugin can be installed from any IDEA-based IDE by searching for Wrap to Column.
It has the additional benefit that you can choose to wrap only sections of text that you want :-)
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Regular expressions in C: examples?
...es with most (all?) *nixes. Here's an example of using POSIX regexes in C (based on this):
#include <regex.h>
regex_t regex;
int reti;
char msgbuf[100];
/* Compile regular expression */
reti = regcomp(&regex, "^a[[:alnum:]]", 0);
if (reti) {
fprintf(stderr, "Could not compile...
ArrayIndexOutOfBoundsException with custom Android Adapter for multiple views in ListView
... For those who are stumped, the ViewType must return a zero based index . eg (0, 1, 2...). in my case i tried to reuse the R.layout... for the ViewType. i guess internally the ViewType's value is being used as the index for recycling pool and not as a key.
– Samu...
String isNullOrEmpty in Java? [duplicate]
...
com.google.common.base.Strings.isNullOrEmpty(String string) from Google Guava
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How to pass parameters correctly?
...angerous!
}
Also notice, that you normally do not resort to the template-based solution unless you have a good reason for it, as it makes your code harder to read. Normally, you should focus on clarity and simplicity.
The above are just simple guidelines, but most of the time they will point you ...
Git submodule update
...epo];
# update your submodule
git submodule update --remote
# or (with rebase)
git submodule update --rebase --remote
See "git submodule update --remote vs git pull".
MindTooth's answer illustrate a manual update (without local configuration):
git submodule -q foreach git pull -q origin maste...
Show pending migrations in rails
...migrations:
20090828200602 Test
Run "rake db:migrate" to update your database then try again.
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Deleting folders in python recursively
...t for the next guy searching for a micropython solution, this works purely based on os (listdir, remove, rmdir). It is neither complete (especially in errorhandling) nor fancy, it will however work in most circumstances.
def deltree(target):
print("deltree", target)
for d in os.listdir(targ...
Ruby on Rails Server options [closed]
... EventMachine library. Other than using the Mongrel HTTP parser, it is not based on Mongrel in any way. Its cluster mode has no process monitoring so you need to monitor crashes etc. There is no Unicorn-like shared socket, so each process listens on its own socket. In theory, Thin's I/O model allows...