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What does “The APR based Apache Tomcat Native library was not found” mean?

...ided in the Java Runtime (such as sendfile, epoll, OpenSSL, system status, etc.). Tomcat will run just fine without it, but for some use cases, it will be faster with the native libraries. If you really want it, download the tcnative-1.dll (or libtcnative.so for Linux) and put it in the bin folder,...
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How does autowiring work in Spring?

... to that context. Web applications have a Servlet, JSF uses a el-resolver, etc. Also, there is a place where the application context is bootstrapped and all beans - autowired. In web applications this can be a startup listener. Autowiring happens by placing an instance of one bean into the desired ...
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What is the use of hashCode in Java?

...ed for bucketing in Hash implementations like HashMap, HashTable, HashSet, etc. The value received from hashCode() is used as the bucket number for storing elements of the set/map. This bucket number is the address of the element inside the set/map. When you do contains() it will take the hash cod...
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Difference between map, applymap and apply methods in Pandas

... fastpaths when called with certain NumPy functions such as mean, sum, etc. share | improve this answer | follow | ...
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JavaScript: How to find out if the user browser is Chrome?

...t this, here's the code I used which excluded Edge, Maxthon, iOS safari ...etc var is_chrome = ((navigator.userAgent.toLowerCase().indexOf('chrome') > -1) &&(navigator.vendor.toLowerCase().indexOf("google") > -1)); – Alex C. Mar 1 '16 at 16:09 ...
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Excel to CSV with UTF8 encoding [closed]

I have an Excel file that has some Spanish characters (tildes, etc.) that I need to convert to a CSV file to use as an import file. However, when I do Save As CSV it mangles the "special" Spanish characters that aren't ASCII characters. It also seems to do this with the left and right quotes and l...
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Get class name of object as string in Swift

...ct can be an instance variable like array, a dictionary, an Int, a NSDate, etc. Because NSObject is the root class of most Objective-C class hierarchies, you could try to make an extension for NSObject to get the class name of every subclass of NSObject. Like this: extension NSObject { var the...
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Why do people hate SQL cursors so much? [closed]

...rn languages that provide first-class collections. Old C, COBOL, Fortran, etc., had to process rows one at a time because there was no notion of "collection" that could be used widely. Java, C#, Python, etc., have first-class list structures to contain result sets. The Slow Issue In some circles...
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How do I spool to a CSV formatted file using SQLPLUS?

...n the primary inner subquery, but aliasing all the columns as col1, col2...etc. is required there. – Amit Naidu May 8 '18 at 22:33 ...
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How can I update npm on Windows?

... Close /shutdown other consoles .. command prompts and PowerShell windows, etc. Even if you're using npm in a command prompt, close it. npm -v (3.10.8) node -v ( v6.6.0) DONE. I'm at the version that I want. share ...