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Check if a key exists inside a json object
...object sent is contain undefined or null
var objarray={
"passenger_id":"59b64a2ad328b62e41f9050d",
"started_ride":"1",
"bus_id":"59b8f920e6f7b87b855393ca",
"route_id":"59b1333c36a6c342e132f5d5",
"start_location":"",
"stop_location":""
}
elementCheck(objarray,function(list){
console.log("list");
)
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How do I use grep to search the current directory for all files having the a string “hello” yet disp
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Noufal IbrahimNoufal Ibrahim
64.7k1111 gold badges115115 silver badges158158 bronze badges
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“f” after number
... I tried the above example with LLVM version 7.0.0 (clang-700.0.65) x86_64-apple-darwin15.0.0 and the .out files were identical as well.
– Nick
Aug 21 '15 at 0:00
add a com...
Return None if Dictionary key is not available
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64
Wonder no more. It's built into the language.
>>> help(dict)
Help on class ...
Way to get all alphabetic chars in an array in PHP?
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pckill
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answered Oct 8 '11 at 7:59
Kyle Michael BeckerKyle Michael Becker
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Command to get nth line of STDOUT
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Jonathan LefflerJonathan Leffler
641k111111 gold badges777777 silver badges11481148 bronze badges
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Add new row to dataframe, at specific row-index, not appended?
...1:r, ], newrow, existingDF[-(1:r), ]) 801.161 831.7730 854.6320 881.6560 10641.417
Benchmarks
As @MatthewDowle always points out to me, benchmarks need to be examined for the scaling as the size of the problem increases. Here we go then:
benchmarkInsertionSolutions <- function(nrow=5,ncol=4)...
How would you do a “not in” query with LINQ?
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64
For people who start with a group of in-memory objects and are querying against a database, I'v...
How to add external library in IntelliJ IDEA?
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This answer is more neat. stackoverflow.com/questions/1051640/…
– 唐龍豹
Oct 18 '16 at 8:50
1
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Why should hash functions use a prime number modulus?
...a safe assumption. But you can still get occasional bad hashing behaviours based on hash functions like the one above, and prime bucket count could help further.
Putting about the principle that "everything has to be prime" is as far as I know a sufficient but not a necessary condition for good dis...