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Multiple INSERT statements vs. single INSERT with multiple VALUES
I'm running a performance comparison between using 1000 INSERT statements:
4 Answers
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兼容主流浏览器的JS复制内容到剪贴板 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...opy_gettext = function(){
clipboardswfdata = document.getElementById('test_text').value;
//alert(clipboardswfdata);
window.document.clipboardswf.SetVariable('str', clipboardswfdata);
}
var floatwin = function(){
alert('复制成功！');
//docum...
Pass a JavaScript function as parameter
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I am so thankful to Javascript for providing this feature and to you @dallin to letting me know that it exists.
– Dipendu Paul
Apr 7 '16 at 11:28
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Is there a simple way to convert C++ enum to string?
... Just make sure your build process doesn't prepend #pragma( once ) before every include file...
– xtofl
Oct 14 '08 at 18:47
24
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PatternSyntaxException: Illegal Repetition when using regex in Java
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The { and } are special in Java's regex dialect (and most other dialects for that matter): they are the opening and closing tokens for the repetition quantifier {n,m} where n and m are integers. Hence the error message: "Illegal repetition".
You should escape them: "\\{\"user_id\" : [0-9]*\\}".
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How to create function that returns nothing
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For other readers, note that the #variable_conflict directive has nothing to do with the rest of the answer. It's just part of an example function; the only important bit is the RETURNS void. Also, cool, I didn't know PL/PgSQ...
Computed / calculated / virtual / derived columns in PostgreSQL
...t iterations. (Not in Postgres 13, yet) .
Related:
Attribute notation for function call gives error
Until then, you can emulate VIRTUAL generated columns with a function using attribute notation (tbl.col) that looks and works much like a virtual generated column. That's a bit of a syntax od...
A complete solution to LOCALLY validate an in-app receipts and bundle receipts on iOS 7
...;
NSData *data;
NSURL *certificateURL = [[NSBundle mainBundle] URLForResource:@"AppleIncRootCertificate" withExtension:@"cer"];
NSData *certificateData = [NSData dataWithContentsOfURL:certificateURL];
if ([self verifyPKCS7:p7 withCertificateData:certificateData])
{
struc...
How to show what a commit did?
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git show <commit-id>
Documentation for git show
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Generate .pem file used to set up Apple Push Notifications
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To enable Push Notification for your iOS app, you will need to create and upload the Apple Push Notification Certificate (.pem file) to us so we will be able to connect to Apple Push Server on your behalf.
(Updated version with updated screen shots Her...