大约有 16,000 项符合查询结果（耗时：0.0233秒） [XML]
Getting raw SQL query string from PDO prepared statements
...I assume you mean that you want the final SQL query, with parameter values interpolated into it. I understand that this would be useful for debugging, but it is not the way prepared statements work. Parameters are not combined with a prepared statement on the client-side, so PDO should never have ...
How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
...
Use INSERT ... ON DUPLICATE KEY UPDATE. For example:
INSERT INTO `usage`
(`thing_id`, `times_used`, `first_time_used`)
VALUES
(4815162342, 1, NOW())
ON DUPLICATE KEY UPDATE
`times_used` = `times_used` + 1
sha...
Set TextView text from html-formatted string resource in XML
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That is what the docs say: developer.android.com/intl/zh-TW/guide/topics/resources/… but is that enough for the TextView to show HTML?
– Macarse
Jul 13 '10 at 13:19
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Time complexity of Euclid's Algorithm
...e, instead of only one, which makes the analysis easier. You can divide it into cases:
Tiny A: 2a <= b
Tiny B: 2b <= a
Small A: 2a > b but a < b
Small B: 2b > a but b < a
Equal: a == b
Now we'll show that every single case decreases the total a+b by at least a quarter:
Tiny A...
How to generate string of a certain length to insert into a file to meet a file size criteria?
...e the following pseudocode:
string contentString = "Lorem Ipsum...";
for (int i = 0; i < fileSizeInKB / contentString.Length; i++)
//write contentString to file
if (fileSizeInKB % contentString.Length > 0)
// write remaining substring of contentString to file
Edit: If you're saving in ...
Redirect stderr and stdout in Bash
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An extra hint: If you use this in a script, make sure it starts with #!/bin/bash rather than #!/bin/sh, since in requires bash.
– Tor Klingberg
Oct 1 '13 at 17:47
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What is ModelState.IsValid valid for in ASP.NET MVC in NerdDinner?
...rsion issues (for example, passing a non-number for something which is an "int"). You can populate ModelState more fully based on whatever validation system you're using.
The sample DataAnnotations model binder will fill model state with validation errors taken from the DataAnnotations attributes o...
Proper use of 'yield return'
...se cases. You fail to mention the potential drawback that it keeps around intermediate state. If you have significant amounts of intermediate state (say a HashSet for duplicate elimination) then the use of yield can inflate your memory footprint.
– Kennet Belenky
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How to use Class in Java?
... behind the scenes over at this question , so we all know that Vector<int[]> is a vector of integer arrays, and HashTable<String, Person> is a table of whose keys are strings and values Person s.
However, what stumps me is the usage of Class<> .
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MySQL DISTINCT on a GROUP_CONCAT()
...e string are duplicated).
What we need to do here is to split each string into different rows, and we first need to create a numbers table:
CREATE TABLE numbers (n INT);
INSERT INTO numbers VALUES
(1),(2),(3),(4),(5),(6),(7),(8),(9),(10);
then we can run this query:
SELECT
SUBSTRING_INDEX(
...