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How to understand nil vs. empty vs. blank in Ruby

...used on strings, arrays and hashes and returns true if: String length == 0 Array length == 0 Hash length == 0 Running .empty? on something that is nil will throw a NoMethodError. That is where .blank? comes in. It is implemented by Rails and will operate on any object as well as work like .empt...
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Should a return statement be inside or outside a lock?

...2 ReturnInside() cil managed { .maxstack 2 .locals init ( [0] int32 CS$1$0000, [1] object CS$2$0001) L_0000: ldsfld object Program::sync L_0005: dup L_0006: stloc.1 L_0007: call void [mscorlib]System.Threading.Monitor::Enter(object) L_000c: call int32 Pr...
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UTF-8 byte[] to String

... 501 Look at the constructor for String String str = new String(bytes, StandardCharsets.UTF_8); A...
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How can I simulate an anchor click via jquery?

...r the #TB_inline add the following query string on to the anchor: ?height=300&width=300&inlineId=myOnPageContent Change the values of height, width, and inlineId in the query accordingly (inlineID is the ID value of the element that contains the content you would like to show in a ThickBox....
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POST unchecked HTML checkboxes

... | edited Aug 15 '15 at 10:11 emotality 11.2k44 gold badges3333 silver badges5353 bronze badges answere...
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How do I run NUnit in debug mode from Visual Studio?

... answered Apr 17 '09 at 10:20 Patrick McDonaldPatrick McDonald 57.9k1313 gold badges9494 silver badges115115 bronze badges ...
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How can I add timestamp to logs using Node.js library Winston?

... Wilfred Springer 10.4k44 gold badges4949 silver badges6868 bronze badges answered Apr 26 '12 at 20:38 imagreenplantimag...
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ipython reads wrong python version

...from IPython import start_ipython if __name__ == '__main__': sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0]) sys.exit(start_ipython()) And mine works properly like this, but my situation isn't exactly like the OP's. Original answer -- 9/30/13: cat /usr/local/bin/ipyth...
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android get all contacts

... null, null, null, null); if ((cur != null ? cur.getCount() : 0) > 0) { while (cur != null && cur.moveToNext()) { String id = cur.getString( cur.getColumnIndex(ContactsContract.Contacts._ID)); String name = cur.getString(cur...
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How to Validate a DateTime in C#?

... 270 DateTime.TryParse This I believe is faster and it means you dont have to use ugly try/catches ...