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Git merge reports “Already up-to-date” though there is a difference

...erge you’ll ever do. :) Use gitk to take a look at your repository. The label for the “test” branch should be somewhere below your “master” branch label. Your branch is up-to-date with respect to its parent. According to merge there are no new changes in the parent since the last merge. ...
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I need to store postal codes in a database. How big should the column be?

...r one reason or another (i.e. because they want another line on a shipping label). You also have to deal with testing the boundary cases (will every application that displays a ZIP handle 50 characters?). And with the fact that when clients are retrieving data from the database, they are generally...
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C++ Lock-free Hazard Pointer(冒险指针) - C/C++ - 清泛网 - 专注C/C++及内核技术

...准库中提供了锁和引用计数方案。锁的缺点很明显,无论哪种锁,在读的时候都会产生较大的开销。引用计数则相对好一些,但每次读取都需要修改引用计数,高并发场景下这样的原子操作也会成为性能瓶颈,毕竟原子加对应...
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CSS styling in Django forms

...class="fieldWrapper"> {{ form.subject.errors }} {{ form.subject.label_tag }} {{ form.subject }} <span class="helptext">{{ form.subject.help_text }}</span> </div> </form> form.subject is an instance of BoundField which has the as_widget() method. You ca...
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Why do most C developers use define instead of const? [duplicate]

...onstant expression is required (such as in an array declaration, or a case label in a switch statement, etc.). Compare with the macro FIELD_WIDTH, which after preprocessing expands to the constant expression 10; this value is known at compile time, so it can be used for array dimensions, case lab...
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Invoke(Delegate)

...o do it on your behalf. For instance, if you want to change the text of a label from a worker thread, you can do something like this: theLabel.Invoke(new Action(() => theLabel.Text = "hello world from worker thread!")); ...
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Error: 10 $digest() iterations reached. Aborting! with dynamic sortby predicate

.... <div ng-app='myApp'> <div ng-controller="testctrl"> <label>{{total}}</label> <table> <tr ng-repeat="item in items track by $index;" ng-init="end($index);"> <td>{{item.number}}</td> </tr> </table> </div&...
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why is plotting with Matplotlib so slow?

...your case, you don't need to re-draw things like the axes boundaries, tick labels, etc. 2) In your case, there are a lot of subplots with a lot of tick labels. These take a long time to draw. Both these can be fixed by using blitting. To do blitting efficiently, you'll have to use backend-spe...
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Why can't a 'continue' statement be inside a 'finally' block?

...e return, break (when breaking out of the block) and goto (when going to a label outside the finally block). For a related Java discussion, see Returning from a finally block in Java. – Jeppe Stig Nielsen Aug 1 '13 at 15:27 ...
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Initializing select with AngularJS and ng-repeat

...th: 200px;" ng-model-options="{trackBy: '$value.id'}"> <md-select-label>{{ user ? user.name : 'Assign to user' }}</md-select-label> <md-option ng-value="user" ng-repeat="user in users">{{user.name}}</md-option> </md-select> ...