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Why is “if not someobj:” better than “if someobj == None:” in Python?
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Although technically correct, this does not explain that tuples, lists, dicts, strs, unicodes, ints, floats, etc. have a nonzero. It is much more common to rely on the truth value of built-in type than to rely on a custom nonzero method.
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Fetch the row which has the Max value for a column
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trouble is it does not return the full record
– Used_By_Already
Aug 7 '14 at 7:03
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How to show SQL queries run in the Rails console?
...e to find the .explain will do the job and not .to_sql. And .explain still does not provide sql query in raw format which I can run in pg console. But I needed the raw query to explain and analyze. I guess will have to do with explain for now.
– abhishek77in
Ju...
Xcode - How to fix 'NSUnknownKeyException', reason: … this class is not key value coding-compliant f
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If deleting app does not work, try deleting the XCode DerivedData folder. which can cache an incorrect xib file. Open XCode -> Preferences -> Locations -> Open the DerivedData folder and drag it to Trash.
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How do I set a conditional breakpoint in gdb, when char* x points to a string whose value equals “he
...iguration inside GDB and searching for --with-python. This little oneliner does the trick, too:
$ gdb -n -quiet -batch -ex 'show configuration' | grep 'with-python'
--with-python=/usr (relocatable)
For your demo case, the usage would be
break <where> if $_streq(x, "hello")
or,...
How to write an async method with out parameter?
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{
var successCounterRef = new Ref<int>();
// Note that it does not make sense to access successCounterRef
// until OperationExampleAsync completes (either fails or succeeds)
// because there’s no synchronization. Here, I think of passing
// the variable as “temporari...
How do I see all foreign keys to a table or column?
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MyISAM does not support foreign keys, unfortunately. dev.mysql.com/doc/refman/5.7/en/myisam-storage-engine.html
– Andy
Mar 24 '15 at 21:23
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When should you branch?
... like branching and tagging through directories with cheap file copy: that does not mean a tag is a branch)
To define a branch means also defining a merge workflow: you need to know where to merge your branch when you are done with it.
For that, the chapter 7 of Practical Perforce (Laura WINGERD - ...
How to change the decimal separator of DecimalFormat from comma to dot/point?
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BigDecimal does not seem to respect Locale settings.
Locale.getDefault(); //returns sl_SI
Slovenian locale should have a decimal comma. Guess I had strange misconceptions regarding numbers.
a = new BigDecimal("1,2") //throws excepti...
Swift - How to convert String to Double
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another issue is that it doesn't not support numbers in different locale other than the 1,000.00, if you use other formats like 1 000,00 it would cut off the 2 decimals at the end. At least this is whats happening for Objective-C. -- As p...