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C++ Best way to get integer division and remainder
...timize, though, at least for g++. A simple experiment with g++ 6.3.0 on x86_64 revealed that with no optimization at all, you get two idivl instructions, but with -O1 or greater, you get one. As the manual says, “Without any optimization option … Statements are independent”.
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Unable to execute dex: Multiple dex files define Lcom/myapp/R$array;
... I was already referencing. So this mysterious "multiple dex files define ____" appeared. Checking the Java Build Path and seeing this new item, and unchecking the originally-included support library solved the problem for me.
– Tom Pace
Sep 26 '13 at 17:20
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How to return a string value from a Bash function
...iable with the string you want to return.
#!/bin/bash
set -x
function pass_back_a_string() {
eval "$1='foo bar rab oof'"
}
return_var=''
pass_back_a_string return_var
echo $return_var
Prints "foo bar rab oof".
Edit: added quoting in the appropriate place to allow whitespace in string to add...
jQuery $.ajax(), $.post sending “OPTIONS” as REQUEST_METHOD in Firefox
... the OPTIONS request and then immediately after that the POST/GET
def send_data(request):
if request.method == "OPTIONS":
response = HttpResponse()
response['Access-Control-Allow-Origin'] = '*'
response['Access-Control-Allow-Methods'] = 'POST, GET, OPTIONS'
resp...
In C, do braces act as a stack frame?
... int big[100000000];
foo(big);
}
bar();
}
gives:
_foobar:
pushl %ebp
movl %esp, %ebp
movl $400000008, %eax
call __alloca
cmpl $0, 8(%ebp)
je L2
leal -400000000(%ebp), %eax
movl %eax, (%esp)
call _foo
L2:
ca...
How to validate inputs dynamically created using ng-repeat, ng-show (angular)
...he jsFiddle showing the usage of the ngForm: http://jsfiddle.net/pkozlowski_opensource/XK2ZT/2/
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Why isn't sizeof for a struct equal to the sum of sizeof of each member?
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If you want the structure to have a certain size with GCC for example use __attribute__((packed)).
On Windows you can set the alignment to one byte when using the cl.exe compier with the /Zp option.
Usually it is easier for the CPU to access data that is a multiple of 4 (or 8), depending platform...
Pretty-print an entire Pandas Series / DataFrame
I work with Series and DataFrames on the terminal a lot. The default __repr__ for a Series returns a reduced sample, with some head and tail values, but the rest missing.
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Count how many records are in a CSV Python?
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You need to count the number of rows:
row_count = sum(1 for row in fileObject) # fileObject is your csv.reader
Using sum() with a generator expression makes for an efficient counter, avoiding storing the whole file in memory.
If you already read 2 rows to start ...
JavaScript post request like a form submit
...y: post('/contact/', {name: 'Johnny Bravo', csrfmiddlewaretoken: $("#csrf_token").val()});
– Davidson Lima
Nov 22 '17 at 16:09
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