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Is errno thread-safe?

...t errno; so my question is, is it safe to check errno value after some calls or use perror() in multi-threaded code. Is this a thread safe variable? If not, then whats the alternative ? ...
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Google maps API V3 - multiple markers on exact same spot

...rieving a list of geo coords via JSON and popping them onto a google map. All is working well except in the instance when I have two or more markers on the exact same spot. The API only displays 1 marker - the top one. This is fair enough I suppose but would like to find a way to display them all...
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Setting PayPal return URL and making it auto return?

... if they don't have Auto Return enabled there, the buyer would need to manually click past the end of checkout in order to be redirected to that URL, rather than being redirected automatically. – SubGothius Aug 11 '16 at 20:58 ...
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Can “using” with more than one resource cause a resource leak?

... No. The compiler will generate a separate finally block for each variable. The spec (§8.13) says: When a resource-acquisition takes the form of a local-variable-declaration, it is possible to acquire multiple resources of a given type. A using statement of the...
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What does the JSLint error 'body of a for in should be wrapped in an if statement' mean?

... First of all, never use a for in loop to enumerate over an array. Never. Use good old for(var i = 0; i<arr.length; i++). The reason behind this is the following: each object in JavaScript has a special field called prototype. Ever...
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How to validate an email address in JavaScript

...b"@gmail.com, _@gmail.com, 1@gmail.com , 1_example@something.gmail.com are all valid, but Gmail will never allow any of these email addresses. You should do this by accepting the email address and sending an email message to that email address, with a code/link the user must visit to confirm validit...
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Django database query: How to get object by id?

Django automatically creates an id field as primary key. 6 Answers 6 ...
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How can I add a PHP page to WordPress?

...og that will execute my PHP code in it, whilst remaining a part of the overall site CSS/theme/design. 17 Answers ...
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Is there a typical state machine implementation pattern?

... Really nice touch how NUM_STATES is defined. – Albin Stigo Dec 19 '15 at 19:38  | ...
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What is the difference between '/' and '//' when used for division?

...floating point division, and the latter is floor division, sometimes also called integer division. In Python 2.2 or later in the 2.x line, there is no difference for integers unless you perform a from __future__ import division, which causes Python 2.x to adopt the 3.x behavior. Regardless of the ...