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扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
... the programmer needs to set Activity Starter with correct parameters, and then call StartActivity. Figure 7 shows the example app that launches Gesture Builder with one button click.
Figure 7. Blocks for example app that launches Gesture Builder with one button click. When the screen initializes...
扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
... the programmer needs to set Activity Starter with correct parameters, and then call StartActivity. Figure 7 shows the example app that launches Gesture Builder with one button click.
Figure 7. Blocks for example app that launches Gesture Builder with one button click. When the screen initializes...
Why aren't ◎ܫ◎ and ☺ valid JavaScript variable names?
...y're different, that's very strange, and exploitable; if they're the same, then that makes sense, and the ZWNJ is indeed only a rendering hack rather than a meaningful part of the variable name.
– Daniel Wagner
Sep 18 '11 at 16:19
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Type-juggling and (strict) greater/lesser-than comparisons in PHP
... admit it puzzles me, and I'm having a hard time to find out basic logical/fundamental things in comparisons.
3 Answers
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用户界面（UI）组件 · App Inventor 2 中文网
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日期选择框（DatePicker）
图像（Image）
TaifunImage 拓展：图像高级处理
SimpleBase64 拓展：图像Base64编解码
标签（Label）
列表选择器（ListPicker）
列表显示框（ListView）
对话框（Notifier）
密码...
Generate class from database table
... column_id ColumnId,
case typ.name
when 'bigint' then 'long'
when 'binary' then 'byte[]'
when 'bit' then 'bool'
when 'char' then 'string'
when 'date' then 'DateTime'
when 'datetime' then 'DateTime'
when...
jQuery deferreds and promises - .then() vs .done()
...uery deferreds and promises and I can't see the difference between using .then() & .done() for successful callbacks. I know Eric Hynds mentions that .done() and .success() map to the same functionality but I'm guessing so does .then() as all the callbacks are all invoked on a completion ...
Oracle: If Table Exists
... EXECUTE IMMEDIATE 'DROP TABLE ' || table_name;
EXCEPTION
WHEN OTHERS THEN
IF SQLCODE != -942 THEN
RAISE;
END IF;
END;
ADDENDUM
For reference, here are the equivalent blocks for other object types:
Sequence
BEGIN
EXECUTE IMMEDIATE 'DROP SEQUENCE ' || sequence_name;
EX...
When is .then(success, fail) considered an antipattern for promises?
I had a look at the bluebird promise FAQ , in which it mentions that .then(success, fail) is an antipattern . I don't quite understand its explanation as for the try and catch.
What's wrong with this the following?
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Dokan虚拟磁盘开发实战 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...tory and (CreationDisposition in [CREATE_NEW, OPEN_ALWAYS, CREATE_ALWAYS]) then begin
MySetFileDate(DokanFileInfo, DateTimeToFileDate(Now)); //Cleanup里会判断FileDate来决定是否保存到远程目录
end;
5.WriteFile: 可用于指示文件是否已修改，和Cleanup配合，以便保...