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App Inventor 2 字典代码块 · App Inventor 2 中文网

...路径的值 获取键路径的值 块是 获取键的值 块的更高级版本,它不是获取特定键的值,而是逐层遍历路径,逐层深入数据结构获取值。 获取键的值 块等同于获取键路径的值 块路径长度为 1。 例如,以下两个块将返回 "Tim the B...
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How do I get list of all tables in a database using TSQL?

... AND TABLE_CATALOG='dbName' --(for MySql, use: TABLE_SCHEMA='dbName' ) PS: For SQL Server 2000: SELECT * FROM sysobjects WHERE xtype='U' share | improve this answer | ...
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How to subtract 30 days from the current datetime in mysql?

... So you proposed not no use NOW() and still use it in your answer. o_O PS: your query would return another result, not what OP probably wants – zerkms May 26 '12 at 1:56 ...
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How to completely remove a dialog on close

...}); And when the error occurs, you would do... $('#myDialog').html("Ooops."); $('#myDialog').dialog('open'); share | improve this answer | follow | ...
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Firefox ignores option selected=“selected”

... Add autocomplete="off" HTML attribute to every select tag. (source: https://stackoverflow.com/a/8258154/260080) share | improve this answer | follow | ...
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Tool for comparing 2 binary files in Windows [closed]

...inary diff, designed for large files) WinDiff bsdiff HexCmp See also: https://web.archive.org/web/20151122151611/https://stackoverflow.com/questions/688504/binary-diff-tool-for-very-large-files share | ...
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Short form for Java if statement

...ty == null? I'd therefore say your middle solution is definitely the best (PS and I approve of the 'unnecessary' parentheses! People need to remember that 99% of coding is communicating with other people (and your future self), not the compiler - otherwise we'd use c!) – Alex ...
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Postgresql - unable to drop database because of some auto connections to DB

...N DATABASE thedb FROM public; (and possibly other users/roles; see \l+ in psql) You can then terminate all connections to this db except your own: SELECT pid, pg_terminate_backend(pid) FROM pg_stat_activity WHERE datname = current_database() AND pid <> pg_backend_pid(); On older versions p...
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Convert boolean to int in Java

... int myInt = myBoolean ? 1 : 0; ^^ PS : true = 1 and false = 0 share | improve this answer | follow | ...
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What IDE to use for Python? [closed]

...|Y |CF|Y |Y*|Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |*JavaScript PyDev (Eclipse) |Y |F |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y |Y | | | | PyScripter |W |F |Y | |Y |Y | |Y |Y |Y | |Y |Y |Y | | | | PythonWin |W |F |Y | |Y | | |Y |Y | | |Y | | | | | | SciTE |Y |F...