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what are the .map files used for in Bootstrap 3.x?
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From Working with CSS preprocessors in Chrome DevTools:
Many developers generate CSS style sheets using a CSS preprocessor, such as Sass, Less, or Stylus. Because the CSS files are generated, editing the CSS files directly is not as helpful.
For preprocessors that su...
Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...droid.com/training/articles/perf-tips.html
原翻译地址：http://hukai.me/android-training-course-in-chinese/performance/performance-tips.html
通常来说，高效的代码需要满足下面两个规则：
不要做冗余的动作
如果能避免，尽量不要分配内存
代码的执...
Numeric for loop in Django templates
How do I write a numeric for loop in a Django template? I mean something like
19 Answers
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Delete files older than 10 days using shell script in Unix [duplicate]
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find is the common tool for this kind of task :
find ./my_dir -mtime +10 -type f -delete
EXPLANATIONS
./my_dir your directory (replace with your own)
-mtime +10 older than 10 days
-type f only files
-delete no surprise. Remove it to test your find filter before executing the whole comma...
How do I rename a column in a database table using SQL?
If I wish to simply rename a column (not change its type or constraints, just its name) in an SQL database using SQL, how do I do that? Or is it not possible?
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How to extract a substring using regex
...gular expression with a Matcher:
"'(.*?)'"
Example:
String mydata = "some string with 'the data i want' inside";
Pattern pattern = Pattern.compile("'(.*?)'");
Matcher matcher = pattern.matcher(mydata);
if (matcher.find())
{
System.out.println(matcher.group(1));
}
Result:
the data i want
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Convert hyphens to camel case (camelCase)
With regex (i assume) or some other method, how can i convert things like:
13 Answers
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Select last row in MySQL
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Yes, there's an auto_increment in there
If you want the last of all the rows in the table, then this is finally the time where MAX(id) is the right answer! Kind of:
SELECT fields FROM table ORDER BY id DESC LIMIT 1;
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MongoDb query condition on comparing 2 fields
... for exact matches between dates in queries. One workaround is using .getTime() to convert to milliseconds or whatever: this.startDate.getTime() == ISODate("2017-01-20T10:55:08.000Z").getTime()
– leinaD_natipaC
Oct 1 '19 at 10:28
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Serializing with Jackson (JSON) - getting “No serializer found”?
...y rule. Jackson 1.9 provides the ObjectMapper.setVisibility() convenience method for doing so. For the example in the original question, I'd likely configure this as
myObjectMapper.setVisibility(JsonMethod.FIELD, Visibility.ANY);
For Jackson >2.0:
myObjectMapper.setVisibility(PropertyAccess...