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How does the “this” keyword work?

...hree different cases: 1. Initial global execution context This is the case for JavaScript code that is evaluated at the top-level, e.g. when directly inside a <script>: <script> alert("I'm evaluated in the initial global execution context!"); setTimeout(function () { alert("I'...
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Commenting in a Bash script inside a multiline command

...r question: echo abc `#Put your comment here` \ def `#Another chance for a comment` \ xyz, etc. And for pipelines specifically, there is a clean solution with no overhead: echo abc | # Normal comment OK here tr a-z A-Z | # Another normal comment OK here sort | # ...
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Print the contents of a DIV

...</body></html>'); mywindow.document.close(); // necessary for IE >= 10 mywindow.focus(); // necessary for IE >= 10*/ mywindow.print(); mywindow.close(); return true; } share ...
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Entity Framework 6 Code first Default value

... you are right. This method only add default constraint at database level. For complete solution you also need to assign default value in constructor of entity or use property with backed field as shown in answer above – gdbdable Feb 18 '15 at 12:39 ...
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The best way to remove duplicate values from NSMutableArray in Objective-C?

... NSArray *copy = [mutableArray copy]; NSInteger index = [copy count] - 1; for (id object in [copy reverseObjectEnumerator]) { if ([mutableArray indexOfObject:object inRange:NSMakeRange(0, index)] != NSNotFound) { [mutableArray removeObjectAtIndex:index]; } index--; } [copy relea...
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Why do access tokens expire?

...attacker can abuse a stolen token. Large scale deployment don't want to perform a database lookup every API call, so instead they issue self-encoded access token which can be verified by decryption. However, this also means there is no way to revoke these tokens so they are issued for a short time a...
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Resize HTML5 canvas to fit window

...lieve I have found an elegant solution to this: JavaScript /* important! for alignment, you should make things * relative to the canvas' current width/height. */ function draw() { var ctx = (a canvas context); ctx.canvas.width = window.innerWidth; ctx.canvas.height = window.innerHeight; ...
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Does a UNIQUE constraint automatically create an INDEX on the field(s)?

Should I define a separate index on the email column (for searching purposes), or is the index is "automatically" added along with UNIQ_EMAIL_USER constraint? ...
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How do I list all the columns in a table?

For the various popular database systems, how do you list all the columns in a table? 12 Answers ...
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LINQ: When to use SingleOrDefault vs. FirstOrDefault() with filtering criteria

... I must say that from performance wise, the FirstOrDefault is working about 10 times faster than SingleOrDefault , using a List<MyClass> of 9,000,000 elements, class contains 2 integers and the Func contains a search of these two integers. Sear...