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How to change column datatype from character to numeric in PostgreSQL 8.4
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The optional USING clause specifies how to compute the new column value from the old; if omitted, the default conversion is the same as an assignment cast from old data type to new. A USING clause must be provided if there is no implicit or assignment cast from old to new type.
So this might wo...
How do I change the root directory of an apache server? [closed]
...e document root of the Apache server? I basically want localhost to come from /users/spencer/projects directory instead of /var/www .
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how to convert from int to char*?
..., particularly to older projects. Plenty of C++ games also still stay away from std::string. Going from int to std::string to char* isn't the same as int to char*.
– Adambean
Jan 25 '16 at 19:05
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NodeJS: Saving a base64-encoded image to disk
My Express app is receiving a base64-encoded PNG from the browser (generated from canvas with toDataURL() ) and writing it to a file. But the file isn't a valid image file, and the "file" utility simply identifies it as "data".
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How to call a parent method from child class in javascript?
...Class.prototype.myMethod.call(this)
Same goes for calling a parent method from child class with arguments:
ParentClass.prototype.myMethod.call(this, arg1, arg2, ..) * Hint: use apply() instead of call() to pass arguments as an array.
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Prevent the keyboard from displaying on activity start
...ng these to false should work though, as the idea is to get the focus away from the EditText boxes.
– Protean
Apr 25 '18 at 5:17
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.NET: Which Exception to Throw When a Required Configuration Setting is Missing?
... there will never be any confusion regarding where the exception is coming from- the framework, or your application. The framework will never throw your custom exceptions.
UPDATE: I agree with the comments, so I have changed the subclass to ConfigurationErrorsException from Exception. I think it...
How to send a simple string between two programs using pipes?
...yfifo";
char buf[MAX_BUF];
/* open, read, and display the message from the FIFO */
fd = open(myfifo, O_RDONLY);
read(fd, buf, MAX_BUF);
printf("Received: %s\n", buf);
close(fd);
return 0;
}
Note: Error checking was omitted from the above code for simplicity.
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Why use Abstract Base Classes in Python?
...but a shared understanding of what those methods should do. If you inherit from this ABC, you are promising to follow all the rules described in the comments, including the semantics of the print() method.
Python's duck-typing has many advantages in flexibility over static-typing, but it doesn't sol...
Upload failed You need to use a different version code for your APK because you already have one wit
... in Google Play's Developer Console? I have just changed the version code from 2 to 3 and it failed to upload the build.
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