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Check if a Postgres JSON array contains a string
...ovements on a table of 1,000,000 rabbits where each rabbit likes two foods and 10% of them like carrots:
d=# -- Postgres 9.3 solution
d=# explain analyze select info->>'name' from rabbits where exists (
d(# select 1 from json_array_elements(info->'food') as food
d(# where food::text = '"...
Why isn't my Pandas 'apply' function referencing multiple columns working? [closed]
I have some problems with the Pandas apply function, when using multiple columns with the following dataframe
6 Answers
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Labels for radio buttons in rails form
...e good one. Caveat: you need Rails >= 2.3.3
– tokland
Dec 10 '10 at 15:27
3
this method also r...
CMake使用教程 - C/C++ - 清泛网 - 专注C/C++及内核技术
...置中使用CheckFunctionExists.cmake
# does this system provide the log and exp functions?
include (CheckFunctionExists.cmake)
check_function_exists (log HAVE_LOG)
check_function_exists (exp HAVE_EXP)
（2）修改.in文件，定义宏。（修改TutorialConfig.h.in，cmake执行中会把宏...
Log to the base 2 in python
....log(x, 2.0)
log2 = math.log2(x) # python 3.4 or later
Thanks @akashchandrakar and @unutbu.
float → int math.frexp(x)
If all you need is the integer part of log base 2 of a floating point number, extracting the exponent is pretty efficient:
log2int_slow = int(math.floor(math.log(x, 2.0)...
How can I change the color of a part of a TextView?
... answered Aug 26 '11 at 17:38
andy bootandy boot
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Following git-flow how should you handle a hotfix of an earlier release?
If you try to follow the git-flow branching model, documented here and with tools here , how should you handle this situation:
...
How to convert array values to lowercase in PHP?
...owing? $yourArray = array_map('mb_strtolower', $yourArray); I just checked and it worked for Cyrillic
– user3841429
May 6 at 2:39
...
What jsf component can render a div tag?
...n the panelGroup solution, as you have to generate this for both the start and end tags if you want to wrap any of your JSF code with the div tag.
Alternatively, all the major UI Frameworks have a div component tag, or you could write your own.
...
Stubbing a class method with Sinon.js
...Sensor, "sample_pressure", function() {return 0})
– danday74
Jul 23 '17 at 0:07
That's in my answer because the origin...