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App Inventor 2 云数据库配置教程 - Firebase/云数据库1/自建后台 · App Inventor 2 中文网
...q.params.action === 'getvalue') {
const [rows] = await pool.execute('SELECT value FROM store WHERE tag = ?', [tag]);
return res.json(['VALUE', tag, rows.length ? rows[0].value : '']);
}
res.json(['ERROR', 'Unknown action: ' + req.params.action]);
} catch (error) { res.json(['ER...
Round a double to 2 decimal places [duplicate]
...
And with DecimalFormat you can also select the rounding mode; default will match the OP's example or they may want RoundingMode.DOWN.
– Kevin Brock
May 11 '10 at 7:03
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Change Active Menu Item on Page Scroll?
... scroll event of the container (usually window).
Quick example:
// Cache selectors
var topMenu = $("#top-menu"),
topMenuHeight = topMenu.outerHeight()+15,
// All list items
menuItems = topMenu.find("a"),
// Anchors corresponding to menu items
scrollItems = menuItems.map(functio...
Need to remove href values when printing in Chrome
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Bootstrap does the same thing (... as the selected answer below).
@media print {
a[href]:after {
content: " (" attr(href) ")";
}
}
Just remove it from there, or override it in your own print stylesheet:
@media print {
a[href]:after {
content: none !...
adb command not found
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Selected answer should be edited/completed with this, because adb moved for a long time and the adb_has_moved.txt is not there anymore
– Serty Oan
Feb 2 '15 at 20:13
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Hibernate - Batch update returned unexpected row count from update: 0 actual row count: 0 expected:
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The solution is to use select for update when fetching the record to lock the row, so nothing else can delete it before you do.
– Matthew Read
May 19 '19 at 15:02
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How to list the contents of a package using YUM?
... reading here
: if not heres a sample command to dump the contents
echo 'SELECT packages.name, GROUP_CONCAT(files.name, ", ") AS files FROM files JOIN packages ON (files.pkgKey = packages.pkgKey) GROUP BY packages.name LIMIT 10;' | sqlite3 -line /var/cache/yum/x86_64/7/base/gen/primary_db.sqlite
...
How to use mysql JOIN without ON condition?
...oins-mysql-database/
You can use 'USING' instead of 'ON' as in the query
SELECT * FROM table1 LEFT JOIN table2 USING (id);
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`require': no such file to load — mkmf (LoadError)
... to use the ubuntu software center there is an add-on for ruby-dev you can select for the 'Header files for compiling extension modules'.
– RightHandedMonkey
Aug 13 '13 at 1:38
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“rm -rf” equivalent for Windows?
... files, rmdir /s /q is typically significantly faster than the equivalent "select dir, shift + delete" operation in explorer.
– Wedge
Sep 19 '08 at 0:29
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