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Arduino101(Genuino 101)&App Inventor – RGB LED控制 - 创客硬件开...
...lor結果顯示在Canvas上,會是一個相當大的負整數後續使用select list item 去解出來之後就會是 0~255 的整數了。Ball 移動到觸碰點位置使用select list item 搭配 split 指令去分別取得該點的紅色、綠色與藍色值,顯示於Label上即可。
[color...
How to remove the URL from the printing page?
...e same way in other browsers also).
Click on Firefox menu , Go to Print , Select Page Set Up from sub menu of Print. A pop will come up on your screen, there go to "Margin & Header /Footer" tab.
In that select "BLANK" for header / footer as per requirement before printing. You can check the ...
Wildcards in jQuery selectors
...htly blurred with respect to the two and so your able to use the attribute selectors for (at least some) properties.
– johntrepreneur
May 10 '13 at 21:14
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Reorder / reset auto increment primary key
...riable, this is okay: SET @a = @a + 1; For other statements, such as SELECT, you might get the results you expect, but this is not guaranteed. In the following statement, you might think that MySQL will evaluate @a first and then do an assignment second: SELECT @a, @a:=@a+1, ...; However...
Jump to function definition in vim
... mentioned you have to use ctags.
You could also consider using plugins to select appropriate one or to preview the definition of the function under cursor.
Without plugins you will have a headache trying to select one of the hundreds overloaded 'doAction' methods as built in ctags support doesn't ...
Laravel 4 Eloquent Query Using WHERE with OR AND OR?
... ->orWhere('d', '=', $d);
})->get();
Will produce a query like:
SELECT * FROM <table> WHERE (a='foo' or b='bar') AND (c='john' or d='doe');
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How to git-cherry-pick only changes to certain files?
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You can also unstage selectively with git reset -p HEAD. It's the equivalent of add -p but very few know that it exists.
– Patrick Schlüter
Mar 14 '17 at 9:09
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What's the difference between TRUNCATE and DELETE in SQL
...tranTest | DELETE FROM tranTest |
| SELECT * FROM tranTest | SELECT * FROM tranTest |
| ROLLBACK | ROLLBACK |
| SELECT * FROM tranTest | SELE...
Optimize Font Awesome for only used classes
...e; done
You then use this with FontSquirrel in the expert mode where you select custom subsetting: http://www.fontsquirrel.com/tools/webfont-generator
In Unicode ranges enter the comma separated values from above.
Then to remove unnecessary stuff from the CSS:
egrep "@fa-var-($fa_icons);" less/...
Vim: Replacing a line with another one yanked before
...
Vp: select line, paste what was yanked
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