大约有 43,000 项符合查询结果（耗时：0.0718秒） [XML]
SQL SELECT WHERE field contains words
...
Rather slow, but working method to include any of words:
SELECT * FROM mytable
WHERE column1 LIKE '%word1%'
OR column1 LIKE '%word2%'
OR column1 LIKE '%word3%'
If you need all words to be present, use this:
SELECT * FROM mytable
WHERE c...
How to get execution time in rails console?
...
timing = Benchmark.measure { Post.all }
The various attributes of the object returned (Benchmark::Tms) are provided here.
share
|
...
How to parse a CSV file using PHP [duplicate]
Suppose I have a .csv file with the following content:
6 Answers
6
...
How to grey out a button?
I have a button defined as shown below. When I want to disable it I use my_btn.setEnabled(false) , but I would also like to grey it out. How can I do that?
...
Why do we need fibers
For Fibers we have got classic example: generating of Fibonacci numbers
2 Answers
2
...
instantiate a class from a variable in PHP?
...
Put the classname into a variable first:
$classname=$var.'Class';
$bar=new $classname("xyz");
This is often the sort of thing you'll see wrapped up in a Factory pattern.
See Namespaces and dynamic language features for further details.
...
Convert base64 string to ArrayBuffer
I need to convert a base64 encode string into an ArrayBuffer.
The base64 strings are user input, they will be copy and pasted from an email, so they're not there when the page is loaded.
I would like to do this in javascript without making an ajax call to the server if possible.
...
Python dict how to create key or append an element to key?
.....)
D.setdefault(k[,d]) -> D.get(k,d), also set D[k]=d if k not in D
share
|
improve this answer
|
follow
|
...
How can I select rows with most recent timestamp for each key value?
...ch row has a sensor id, a timestamp, and other fields. I want to select a single row with latest timestamp for each sensor, including some of the other fields.
...
How to delete files older than X hours
I'm writing a bash script that needs to delete old files.
10 Answers
10
...