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possibly undefined macro: AC_MSG_ERROR

... I had this same issue and found that pkg-config package was missing. After installing the package, everything generated correctly. share | impro...
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How do I clone a generic list in C#?

I have a generic list of objects in C#, and wish to clone the list. The items within the list are cloneable, but there doesn't seem to be an option to do list.Clone() . ...
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Add floating point value to android resources/values

I'm trying to add a little space between lines to my TextViews using android:lineSpacingMultiplier from the documentation : ...
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How do I add spacing between columns in Bootstrap?

...sistent so that all of your columns line up correctly. To get even spacing and column size I would do the following: <div class="row"> <div class="col-md-5"></div> <div class="col-md-5 col-md-offset-2"></div> </div> In Bootstrap 4 use: offset-2 or offset-md-2...
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Type definition in object literal in TypeScript

...has methods as well as properties? Since the class doesn't get initialized and we only assign properties, calling a method on the class will cause a null exception. Basically, the object we create only 'acts' as the class because we assign its type, but it is not actually an instance of that class. ...
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Placement of the ng-app directive (html vs body)

I recently reviewed the code for a webapp built with angular and found that it was written with the ng-app="myModule" directive placed on the <body> tag. When learning angular, I've only ever seen it used on the <html> tag, as recommended by the angular docs here , here , and in...
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How to give System property to my test via Gradle and -D

... The -P flag is for gradle properties, and the -D flag is for JVM properties. Because the test may be forked in a new JVM, the -D argument passed to gradle will not be propagated to the test - it sounds like that is the behavior you are seeing. You can use the sy...
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How can I do an UPDATE statement with JOIN in SQL Server?

...to do it in ANSI/ISO (aka should work on any SQL DBMS), MySQL, SQL Server, and Oracle. Be advised that my suggested ANSI/ISO method will typically be much slower than the other two methods, but if you're using a SQL DBMS other than MySQL, SQL Server, or Oracle, then it may be the only way to go (e.g...
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Can an int be null in Java?

...areful when unboxing null Integers since this can cause a lot of confusion and head scratching! e.g. this: int a = object.getA(); // getA returns a null Integer will give you a NullPointerException, despite object not being null! To follow up on your question, if you want to indicate the absen...
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Could not open a connection to your authentication agent

...h-agent? You might need to start ssh-agent before you run the ssh-add command: eval `ssh-agent -s` ssh-add Note that this will start the agent for msysgit Bash on Windows. If you're using a different shell or operating system, you might need to use a variant of the command, such as those listed ...