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In HTML I can make a checkmark with ✓ . Is there a corresponding X-mark?

... The complete reference is called Unicode! You could look amongst the “Symbols/Other” character, perhaps (though you font probably won't have glyphs for much of it): fileformat.info/info/unicode/category/So/list.htm – bobince ...
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What does && mean in void *p = &&abc;

... OS loads the .exe file from the disk, a component of the operating system called "the loader" (windows has the "PE Loader", linux has "ELF loader" or maybe even others, if they're compiled in the kernel), it does a "virtualization" of that program, turning it into a process. This process thinks it ...
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Why Collections.sort uses merge sort instead of quicksort?

... to provide a stable sort (Merge Sort) to sort object references. (Techincally speaking, multiple sequential stable sorts result in a lexicographic ordering on the keys in the reverse order of the sorts: the final sort determines the most significant subkey.) It's a nice side benefit th...
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Difference between Document-based and Key/Value-based databases?

...me debate on the correct name for databases such as Cassandra, I'd like to call them column-family stores. Although key-value pairs are an essential part of Cassandra, it's not limited to just that. It allows you to nest key-value pairs, so a key could refer to multiple sub-key-value pairs. You can...
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How to convert a boolean array to an int array

... what i've read, if you need to do some time critical crunching you should call c from python. Do you know any references for doing this? also, thank you for your help. surprised how fast everyone responded! – Kwolf Jul 6 '13 at 20:54 ...
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Moving default AVD configuration folder (.android)

...e answer. Move .android folder to E:\Android Create environment variable called ANDROID_SDK_HOME and set its value to E:\Android Setting the environment variable on Windows XP or Windows 7: Right-click on My Computer and choose "Properties" Click the "Advanced" tab Click the button "Environmen...
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Reload .profile in bash shell script (in unix)?

... contents of .profile file. Ad 2) You can start any bash script either by calling sh myscript.sh or . myscript.sh In the first case this will create a subshell that will not affect the environment variables of your system and they will be visible only to the subshell process. After finishin...
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Default value in Go's method

...ts on the subject, but here are some specific examples. **Option 1:** The caller chooses to use default values // Both parameters are optional, use empty string for default value func Concat1(a string, b int) string { if a == "" { a = "default-a" } if b == 0 { b = 5 } return fmt....
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Flask-SQLalchemy update a row's information

... you're still confused on the differences after reading through there, consider asking another question. – Mark Hildreth Jul 15 '11 at 15:36 ...
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Ruby class types and case statements

...sif Array === item ... elsif String === item ... Understand that case is calling a threequal method (MyClass.===(item) for example), and that method can be defined to do whatever you want, and then you can use the case statement with precisionw ...