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Best way to track onchange as-you-type in input type=“text”?

...e', inputHandler); // for IE8 // Firefox/Edge18-/IE9+ don’t fire on <select><option> // source.addEventListener('change', inputHandler); <input id="source"> <div id="result"></div> ...
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Handling optional parameters in javascript

....length); } //fire callback with args and remaining values concatenated return callback.apply(null, args.concat(values)); }; //if there are not values to process, just fire callback if (!values.length) { return done(); } //loop through configs to create mo...
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Remove Object from Array using JavaScript

...n x, use: someArray.splice(x, 1); Or someArray = someArray.slice(0, x).concat(someArray.slice(-x)); Reply to the comment of @chill182: you can remove one or more elements from an array using Array.filter, or Array.splice combined with Array.findIndex (see MDN), e.g. // non destructive fil...
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How to get the difference between two arrays in JavaScript?

...arr1 .filter(x => !arr2.includes(x)) .concat(arr2.filter(x => !arr1.includes(x))); This way, you will get an array containing all the elements of arr1 that are not in arr2 and vice-versa As @Joshaven Potter pointed out on his answer, you can add this to A...
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How to print Boolean flag in NSLog?

...ut integers only, they are just type casted values like... typedef signed char BOOL; #define YES (BOOL)1 #define NO (BOOL)0 BOOL value = YES; NSLog(@"Bool value: %d",value); If output is 1,YES otherwise NO share ...
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Converting bool to text in C++

...ation (which avoids the issue that Rodney and dwj mentioned. inline const char * const BoolToString(bool b) { return b ? "true" : "false"; } Aside from that I have a few other gripes, particularly with the accepted answer :) // this is used in C, not C++. if you want to use printf, instead inc...
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Is Chrome's JavaScript console lazy about evaluating arrays?

... // and arr2 changes, then later value might be shown 4. arr.concat() // a new array is created, but same issue as slice(0) 5. JSON.stringify(arr) // works well as it takes a snapshot of the whole array // or object, and the format shows the exact struct...
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How to sort an array by a date property

... for (var i=this.length;i;){ var o = this[--i]; this[i] = [].concat(f.call(o,o,i),o); } this.sort(function(a,b){ for (var i=0,len=a.length;i<len;++i){ if (a[i]!=b[i]) return a[i]<b[i]?-1:1; } return 0; }); for (var i=this.length;i;){ ...
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Check if a String contains numbers Java

... To explain: .* means any character from 0 to infinite occurence, than the \\d+ (double backslash I think is just to escape the second backslash) and \d+ means a digit from 1 time to infinite. – Giudark Sep 29 '1...
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How do I wrap text in a pre tag?

...de wont get word-wrapped in the middle of a path or something. Easier to select text range in a text area too if you want to copy to clipboard. The following is a php excerpt so if your not in php then the way you pack the html special chars will vary. <textarea style="font-family:monospace;"...