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java: HashMap not working

..."foo"); instead of: int i = myMap.get("foo").intValue(); The implicit call to intValue() means if the key isn't found it will generate a NullPointerException, for example: int i = myMap.get("bar"); // NullPointerException The reason is type erasure. Unlike, say, in C# generic types aren't re...
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Disable building workspace process in Eclipse

...kspace. You can also disable it through the menu "Project / Build automatically". But I would recommend first to check: if a Project Clean all / Build result in the same kind of long wait (after disabling this option) if you have (this time with building automatically activated) some validation ...
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How to not wrap contents of a div?

I've got a fixed-width div with two buttons in it. If the labels of the buttons are too long, they wrap – one button stays on the first line, and the next button follows underneath it instead of adjacent to it. ...
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how to check redis instance version?

... is that sometimes you don't have access to the server (e.g. when it's provided to you on the cloud), in which case INFO is your only option. share | improve this answer | fo...
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Checking whether a variable is an integer or not [duplicate]

... # do something special Edit: You can always convert to a float before calling this method. The three possibilities: >>> float(5).is_integer() True >>> float(5.1).is_integer() False >>> float(5.0).is_integer() True Otherwise, you could check if it is an int first li...
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What is the 'cls' variable used for in Python classes?

...on. There is difference between 'self' and 'cls' used method though analogically they are at same place def moon(self, moon_name): self.MName = moon_name #but here cls method its use is different @classmethod def moon(cls, moon_name): instance = cls() instance.MName = moon_name No...
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How to escape special characters in building a JSON string?

... Even the supposedly clarifying update to this answer is bad. While technically true, it is misleading to say that you "don't need" to escape ', in much the same way that it is technically true but misleading to say that legally you don't need to murder children. More correct would be to say that y...
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Open file dialog box in JavaScript

...mit the file types displayed in the file browser dialog. Fine Uploader provides access to this functionality via the acceptFiles property of the validation option. See the validation section of the options documentation for more details. Note that the accept attribute is not supported in IE9 or earl...
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How to pass an object into a state using UI-router?

...to $state.go, $state.go('myState', {myParam: {some: 'thing'}}) $stateProvider.state('myState', { url: '/myState/{myParam:json}', params: {myParam: null}, ... and then access the parameter in your controller. $stateParams.myParam //should be {some: 'thing'} myPa...
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How do I cancel form submission in submit button onclick event?

... You are better off doing... <form onsubmit="return isValidForm()" /> If isValidForm() returns false, then your form doesn't submit. You should also probably move your event handler from inline. document.getElementById('my-form').onsubmit = function() { return isValidFor...