大约有 1,900 项符合查询结果（耗时：0.0210秒） [XML]
How do I calculate square root in Python?
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You have to write: sqrt = x**(1/2.0), otherwise an integer division is performed and the expression 1/2 returns 0.
This behavior is "normal" in Python 2.x, whereas in Python 3.x 1/2 evaluates to 0.5. If you want your Python 2.x code to behave like 3.x w.r....
Delete all documents from index/type without deleting type
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Ftr: in Elasticsearch 2.0 the delete by query API has been removed from the core and now lives in a plugin.
– dtk
Nov 16 '15 at 14:41
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How to add and get Header values in WebApi
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For WEB API 2.0:
I had to use Request.Content.Headers instead of Request.Headers
and then i declared an extestion as below
/// <summary>
/// Returns an individual HTTP Header value
/// </summary>
/// <par...
Verifying that a string contains only letters in C#
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For those of you who would rather not go with Regex and are on the .NET 2.0 Framework (AKA no LINQ):
Only Letters:
public static bool IsAllLetters(string s)
{
foreach (char c in s)
{
if (!Char.IsLetter(c))
return false;
}
return true;
}
Only Numbers:
p...
How to get UILabel to respond to tap?
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Swift 2.0:
I am adding a nsmutable string as sampleLabel's text, enabling user interaction, adding a tap gesture and trigger a method.
override func viewDidLoad() {
super.viewDidLoad()
let newsString: NSMutableAttributed...
Calling a method every x minutes
...ple, you can have it from here ActionScheduler
It supports .NET Standard 2.0
And here how to start using it
using ActionScheduler;
var jobScheduler = new JobScheduler(TimeSpan.FromMinutes(8), new Action(() => {
//What you want to execute
}));
jobScheduler.Start(); // To Start up the Sche...
How to pass parameters to ThreadStart method in Thread?
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@ŁukaszW.pl - what Noldorin said ;p in C# 2.0 an alternative construct (for this example) is new Thread(delegate() { download(filename); });
– Marc Gravell♦
Jul 29 '10 at 8:29
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Best PHP IDE for Mac? (Preferably free!) [closed]
...ent features. Downside: Not a supported product any more. Aptana Studio 2.0+ uses PDT which is a watered down, under-developed (at present) php plug in.
Zend Studio - Almost identical to Aptana, except no word wrap and you can't change alot of the php configuration on the MAC apparently due to b...
get size of json object
...al":"70.1"},{"id":"429","code":"0.84.SMAB00060","price":"4147.5","volume":"2.0","total":"82.95"},{"id":"428","code":"0.84.SMAB00050","price":"4077.5","volume":"3.0","total":"122.32"}]
var obj = JSON.parse(json);
var length = Object.keys(obj).length; //you get length json result 4
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Any way to replace characters on Swift String?
... I don't know if I'm doing something wrong but the second swift 2.0 solution leaves me with and optional string. Original String looks like this: "x86_64" and the new mapping looks like "Optional([\"x\", \"8\", \"6\", \"_\", \"6\", \"4\"])"
– John Shelley
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