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How do I check if file exists in jQuery or pure JavaScript?

...ajax({ url:'http://www.example.com/somefile.ext', type:'HEAD', error: function() { //file not exists }, success: function() { //file exists } }); EDIT: Here is the code for checking 404 status, without using jQuery function UrlExists(url) { var...
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TypeError: 'module' object is not callable

Why am I getting this error? I'm confused. 11 Answers 11 ...
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Determine path of the executing script

... Got the same error, with a saved scriptt and freshly installed and run R 3.2.0 on windows... – RalfB May 20 '15 at 9:57 ...
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Show filename and line number in grep output

I am trying to search my rails directory using grep. I am looking for a specific word and I want to grep to print out the file name and line number. ...
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Getting the first and last day of a month, using a given DateTime object

I want to get the first day and last day of the month where a given date lies in. The date comes from a value in a UI field. ...
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How do I POST urlencoded form data with $http without jQuery?

...(function(response) { // on success }, function(response) { // on error }); Works like a charm with AngularJS 1.5 People, let give u some advice: use promises .then(success, error) when dealing with $http, forget about .sucess and .error callbacks (as they are being deprecated) From t...
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Swap key with value JSON

... SyntaxError: /Users/markus/Entwicklung/IT1_Beleg/public/es6/vokabeltrainer.js: Unexpected token (53:45) 51 | if (btoa) { 52 | entries = Object.entries(entries) > 53 | .reduce((obj, [key, value]) =>...
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Failed loading english.pickle with nltk.data.load

..._data] Downloading package punkt to /home/my_user/nltk_data... [nltk_data] Error downloading 'punkt' from [nltk_data] <https://raw.githubusercontent.com/nltk/nltk_data/gh- [nltk_data] pages/packages/tokenizers/punkt.zip>: HTTP Error [nltk_data] 503: first byte timeout ...
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How can I prevent Visual Studio 2013 from closing my IIS Express app when I end debugging?

Previously in 2012, if I debugged in Chrome (for example), and then stopped the debugger, the website would remain running in IIS Express. This no longer seems to be the case in 2013. ...
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What is object serialization?

What is meant by "object serialization"? Can you please explain it with some examples? 14 Answers ...