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Dynamic SQL - EXEC(@SQL) versus EXEC SP_EXECUTESQL(@SQL)
...
EXEC('SELECT * FROM FOO WHERE ID=?', 123) will replace the parameter placeholder "?" with the value 123 and then execute the query, returning a result for SELECT * FROM FOO WHERE ID=123
– Peter Wone
Jun 1 '10 at 23:27
...
sed: print only matching group
...it with a 2nd grep.
# To extract \1 from /xx([0-9]+)yy/
$ echo "aa678bb xx123yy xx4yy aa42 aa9bb" | grep -Eo 'xx[0-9]+yy' | grep -Eo '[0-9]+'
123
4
# To extract \1 from /a([0-9]+)b/
$ echo "aa678bb xx123yy xx4yy aa42 aa9bb" | grep -Eo 'a[0-9]+b' | grep -Eo '[0-9]+'
678
9
...
App Inventor 2 远程音频播放教程 - 网络音乐与语音播放 · App Inventor 2 中文网
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技能与 AI 助手同源生成对比：十个原生案例 · App Inventor 2 中文网
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What does the “yield” keyword do?
...one, etc. And generators return... well that's where yield comes in:
def f123():
yield 1
yield 2
yield 3
for item in f123():
print item
Instead of yield statements, if you had three return statements in f123() only the first would get executed, and the function would exit. But f1...
CSS \9 in width property
... \0 instead of \9 will apply it to IE10 as well
– abc123
Oct 9 '13 at 21:26
21
@abc123 lets hope ...
编辑你的应用（复制和粘贴） · App Inventor 2 中文网
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How to show full object in Chrome console?
...null,4));
}
// how to call it
let obj = { a: 1, b: [2,3] };
print('hello',123,obj);
will output in console:
[
"hello",
123,
{
"a": 1,
"b": [
2,
3
]
}
]
sha...
module.exports vs exports in Node.js
...:
var x = require('file1.js');
contents of file1.js:
module.exports = '123';
When the above statement is executed, a Module object is created. Its constructor function is:
function Module(id, parent) {
this.id = id;
this.exports = {};
this.parent = parent;
if (parent &&...
设备发现（DeviceDiscovery）使用指导 · App Inventor 2 中文网
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