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Choosing between std::map and std::unordered_map [duplicate]
...prone: numbers passed through unaltered, only 10 characters spaced along a string of any length are combined in the hash value, bucket counts aren't prime. (GNU is at the opposite end of the spectrum).
– Tony Delroy
Aug 27 '15 at 3:49
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Extracting Nupkg files using command line
Firstly, I do not want to use Visual Studio at all when dealing with the certain .nupkg files.
6 Answers
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How to use a variable for the key part of a map
... value-part it's even easier, since there is no automagic "convert text to string" happening:
def map = [keyA:A, keyX:X]
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What's better to use in PHP, $array[] = $value or array_push($array, $value)?
...is pretty irrelevant unless you plan on appending hundreds of thousands of strings to your array.
Edit: Ran this code:
$t = microtime(true);
$array = array();
for($i = 0; $i < 10000; $i++) {
$array[] = $i;
}
print microtime(true) - $t;
print '<br>';
$t = microtime(true);
$array = array(...
Display the current time and date in an Android application
...is. I assume you want to put the current date & time into a TextView.
String currentDateTimeString = java.text.DateFormat.getDateTimeInstance().format(new Date());
// textView is the TextView view that should display it
textView.setText(currentDateTimeString);
There is more to read in the do...
Can I apply the required attribute to fields in HTML5?
... element in the
select element's list of options (if
any) is the empty string (i.e. present as value=""),
and that
option element's parent node is the
select element (and not an optgroup
element),
then that option is the
select element's placeholder label
option.
...
Most pythonic way to delete a file which may not exist
... os.remove(filename)
If filename is a pathlib.Path object instead of a string, we can call its .unlink() method instead of using os.remove(). In my experience, Path objects are more useful than strings for filesystem manipulation.
Since everything in this answer is exclusive to Python 3, it pr...
正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...尽可能少重复
处理选项
在C#中，你可以使用Regex(String, RegexOptions)构造函数来设置正则表达式的处理选项。如：Regex regex = new Regex(@"\ba\w{6}\b", RegexOptions.IgnoreCase);
上面介绍了几个选项如忽略大小写，处理多行等，这些选项...
Using %f with strftime() in Python to get microseconds
...c = repr(now).split('.')[1][:3]
print mlsec
# Get your required timestamp string
timestamp = time.strftime("%Y-%m-%d %H:%M:%S.{} %Z".format(mlsec), struct_now)
print timestamp
For clarification purposes, I also paste my Python 2.7.12 result here:
>>> import time
>>> # get curre...
Enabling auto layout in iOS 6 while remaining backwards compatible with iOS 5
...ve of your .app file. Does having two targets make that process harder at all? Thanks.
– Crystal
May 16 '13 at 2:55
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