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Does Java 8 provide a good way to repeat a value or function?
....nCopies call creates a List containing n copies of whatever value you provide. In this case it's the boxed Integer value 1. Of course it doesn't actually create a list with n elements; it creates a "virtualized" list that contains only the value and the length, and any call to get within range just...
Implementing slicing in __getitem__
...key) #Get the data from elsewhere
else:
raise TypeError, "Invalid argument type."
The slice doesn't return the same type, which is a no-no, but it works for me.
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The performance impact of using instanceof in Java
...e instanceof operator. While I know that OO design generally tries to avoid using instanceof , that is a different story and this question is purely related to performance. I was wondering if there is any performance impact? Is is just as fast as == ?
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CSS z-index paradox flower
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Here's my attempt: http://jsfiddle.net/Kx2k5/1/
(successfully tested on Fx27, Ch33, IE9, Sf5.1.10 and Op19)
CSS
.item {
/* include borders on width and height */
-webkit-box-sizing : border-box;
-moz-box-sizing : border-box;
box-sizi...
Intercept page exit event
When editing a page within my system, a user might decide to navigate to another website and in doing so could lose all the edits they have not saved.
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Why does Internet Explorer not send HTTP post body on Ajax call after failure?
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There does not seem to be a clear answer to this question, so I will provide my empirical data as a substitute and provide some ways to work around it. Maybe some MS insider will one day shed some light on this...
If HTTP Keep-Alive is disabled on the server, this issue goes away. In other words...
What's the difference between findAndModify and update in MongoDB?
... do I need to return the item first? I read the MongoDB: the definitive guide and it says that it is handy for manipulating queues and performing other operations that need get-and-set style atomicity. But I didn't understand how it achieves this. Can somebody explain this to me?
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TFS checkin error - could not find file
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@doingweb provided a better answer. You can fix this warning via TFS, without manual file manipulation. After adding a new Project and deleting an old Project from a Solution, I had a similar error. My fix: 1. Exclude the old project and (...
Angularjs ng-model doesn't work inside ng-if
Here is the fiddle showing the problem. http://jsfiddle.net/Erk4V/1/
6 Answers
6
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Count number of matches of a regex in Javascript
...wer
The problem with your initial code is that you are missing the global identifier:
>>> 'hi there how are you'.match(/\s/g).length;
4
Without the g part of the regex it will only match the first occurrence and stop there.
Also note that your regex will count successive spaces twice:
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