大约有 45,000 项符合查询结果（耗时：0.0301秒） [XML]
Best way to test if a row exists in a MySQL table
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Suggest you not to use Count because count always makes extra loads for db use SELECT 1 and it returns 1 if your record right there otherwise it returns null and you can handle it.
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How to set input type date's default value to today?
... day;
$('#datePicker').val(today);
});
I would probably put a bit of extra time to see if the month and date are single digits and prefix them with the extra zero...but this should give you an idea.
EDIT: Added check for the extra zero
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Named capturing groups in JavaScript regex?
...y valuable. For example, if you want to use a regex to parse a date from a string, you could write a flexible function that takes the value and the regex. As long as the regex has named captures for the year, month and date you could run through an array of regular expressions with minimal code.
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Does reading an entire file leave the file handle open?
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Instead of retrieving the file content as a single string,
it can be handy to store the content as a list of all lines the file comprises:
with open('Path/to/file', 'r') as content_file:
content_list = content_file.read().strip().split("\n")
As can be seen, one needs t...
Specifying column name in a “references” migration
...eferences :col_name, references: other_table_name works without installing extra gems.
– Qqwy
Sep 9 '19 at 14:26
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Is there any difference between a GUID and a UUID?
... way as a UUID. For example, the RSS specification defines GUIDs to be any string of your choosing, as long as it's unique, with an "isPermalink" attribute to specify that the value you're using is just a permalink back to the item being syndicated.
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Handle file download from ajax post
...p that sends ajax POST requests to a certain URL. Response might be a JSON string or it might be a file (as an attachment). I can easily detect Content-Type and Content-Disposition in my ajax call, but once I detect that the response contains a file, how do I offer the client to download it? I've re...
Unknown Column In Where Clause
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I believe you have an extra ( in your query before the (COUNT(*) which isn't closed anywhere.
– tftd
Nov 27 '12 at 16:09
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Best practice multi language website
...e our translated files instead of calling a translation function for every string in the file:
// This function was written by Thomas Bley, not by me
function translate($file) {
$cache_file = 'cache/'.LANG.'_'.basename($file).'_'.filemtime($file).'.php';
// (re)build translation?
if (!file_ex...
What are good grep tools for Windows? [closed]
...owerGREP.)
Additional solutions
Existing Windows commands
FINDSTR
Select-String in PowerShell
Linux command implementations on Windows
Cygwin
Cash
Grep tools with a graphical interface
AstroGrep
BareGrep
GrepWin
Additional Grep tools
dnGrep
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