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Concatenating null strings in Java [duplicate]

...ng Conversion", requires this operation to succeed without failure: ...Now only reference values need to be considered. If the reference is null, it is converted to the string "null" (four ASCII characters n, u, l, l). Otherwise, the conversion is performed as if by an invocation of the toString...
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Bootstrap control with multiple “data-toggle”

... The problem with this (and other solutions in this question right now) is that when you click to open the modal, and then close it, the tooltip shows up again (or stays visible) even though the mouse has left the button. This is very annoying if you e.g. have buttons in a table on every row...
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Named string formatting in C#

...rg : I've been using SmartFormat for all my formatting needs for some time now, love it. github.com/scottrippey/SmartFormat – quentin-starin Aug 30 '12 at 2:10 ...
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Use of #pragma in C

... thread 3 Note that the order of output can vary on different machines. now let me tell you what #pragma did... it tells the OS to run the some block of code on 4 threads this is just one of many many applications you can do with the little #pragma sorry for the outside sample OpenMP ...
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How can I check the extension of a file?

...rmalise it to lowercase. ext = os.path.splitext(fp)[-1].lower() # Now we can simply use == to check for equality, no need for wildcards. if ext == ".mp3": print fp, "is an mp3!" elif ext == ".flac": print fp, "is a flac file!" else: print fp, "is an unkno...
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Java Hashmap: How to get key from value?

... Apache Collections now supports generics commons.apache.org/proper/commons-collections/javadocs/… – kervin May 31 '15 at 16:28 ...
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Find object in list that has attribute equal to some value (that meets any condition)

...t None stuff or whatever at this point, if you don't like exceptions. I know that generally in python list comprehensions are preferred or at least that is what I read, but I don't see the issue to be honest. Of course Python is not an FP language, but Map / Reduce / Filter are perfectly readable ...
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How to check file input size with jQuery?

...added here more details and links about other file information you should know: http://felipe.sabino.me/javascript/2012/01/30/javascipt-checking-the-file-size/ Old browsers support Be aware that old browsers will return a null value for the previous this.files call, so accessing this.files[0] wi...
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reformat in vim for a nice column layout

... Anyone know of a solution to work with quoted columns with commas in the column? example "2151 Main ST Houston, TX" – metrix Dec 30 '13 at 2:47 ...
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How to import a jar in Eclipse

...stall Eclipse or your OS you won't have to rwlink anything except the JDK) Now select the jar files you want. Click OK. Right click on your project and choose Build Path -> Add Library FYI just code and then right click and Source->Organize Imports ...