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mongodb count num of distinct values per field/key
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StennieStennie
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49
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How to show popup message like in Stack Overflow
... {
font-family:Arial,Helvetica,sans-serif;
position:fixed;
top:0px;
left:0px;
width:100%;
z-index:105;
text-align:center;
font-weight:bold;
font-size:100%;
color:white;
padding:10px 0px 10px 0px;
background-color:#8E1609;
}
#message span {
text-al...
How to deserialize a list using GSON or another JSON library in Java?
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edited Jul 15 '16 at 20:56
answered Nov 30 '10 at 21:14
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Getting and removing the first character of a string
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170
See ?substring.
x <- 'hello stackoverflow'
substring(x, 1, 1)
## [1] "h"
substring(x, 2)
## ...
What is the difference between “AS” and “IS” in an Oracle stored procedure?
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answered Oct 23 '08 at 16:18
Tony AndrewsTony Andrews
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How does Haskell printf work?
... "%d" "hi"
– Travis Sunderland
May 10 '19 at 14:42
add a comment
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To find whether a column exists in data frame or not
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202
Assuming that the name of your data frame is dat and that your column name to check is "d", you...
What's invokedynamic and how do I use it?
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edited Jul 10 '11 at 12:08
answered Jul 10 '11 at 2:23
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PHP Sort Array By SubArray Value
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208
Use usort.
function cmp_by_optionNumber($a, $b) {
return $a["optionNumber"] - $b["optionNumb...
Override compile flags for single files
...add_compile_options
add_compile_options(-Wall -Weffc++ -pedantic -std=c++0x)
or for CMake versions < 3.0 to do something more like:
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Weffc++ -pedantic -std=c++0x")
In response to further questions in the comments below, I believe it's impossi...