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What does do?

...15 Update This answer was posted several years ago and now the question really should be should you even consider using the X-UA-Compatible tag on your site? with the changes Microsoft has made to its browsers (more on those below). Depending upon what Microsoft browsers you support you may not ne...
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Why does Double.NaN==Double.NaN return false?

...enormalized value or a signed zero, and an operation that has no mathematically definite result produces NaN. All numeric operations with NaN as an operand produce NaN as a result. As has already been described, NaN is unordered, so a numeric comparison operation involving one or two NaNs returns fa...
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Warning “Do not Access Superglobal $_POST Array Directly” on Netbeans 7.4 for PHP

...rning may disappear, but if you don't specify a filter then you will not really fix the security issue NetBeans is pointing out. For example, if you are expecting an int, use: filter_input(INPUT_POST, 'var_name', FILTER_SANITIZE_NUMBER_INT) – HoffZ Jul 18 '14 a...
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Flask-SQLalchemy update a row's information

...e many objects to be updated. If you want to give add_user permission to all the admins, rows_changed = User.query.filter_by(role='admin').update(dict(permission='add_user')) db.session.commit() Notice that filter_by takes keyword arguments (use only one =) as opposed to filter which takes an e...
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Chrome, Javascript, window.open in new tab

...pup’) by specifying options in the 3rd parameter 3. If the window.open call was not part of a user-initiated event, it’ll open in a new window. 4. A “user initiated event” does not have to the same function call – but it must originate in the function invoked by a user click 5. If a use...
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Handlebars.js Else If

... {{#if FriendStatus.IsFriend}} <div class="ui-state-default ui-corner-all" title=".ui-icon-mail-closed"><span class="ui-icon ui-icon-mail-closed"></span></div> {{else if FriendStatus.FriendRequested}} <div class="ui-state-default ui-corner-all" title=".ui-icon-check"&g...
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How to include external Python code to use in other files?

...ods in a file, is there a way to include those files in another file, but call them without any prefix (i.e. file prefix)? ...
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Replace all 0 values to NA

...idered as null in statistical analysis. What is the fastest way to replace all the 0 value to NULL in R? 8 Answers ...
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Python extending with - using super() Python 3 vs Python 2

Originally I wanted to ask this question , but then I found it was already thought of before... 5 Answers ...
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Get JavaScript object from array of objects by value of property [duplicate]

...I wrote that "methods like find() and arrow functions are not supported by all browsers". – Michał Perłakowski Sep 22 '16 at 13:43 4 ...