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Postgis installation: type “geometry” does not exist
...he same problem. My postgis extension puts it's data into a custom SCHEME, called postgis. I needed to run the following command, and everything was well again: DO $$ BEGIN EXECUTE 'alter database '||current_database()||' set search_path = "$user", public, lookup, postgis'; END; $$ ;
...
How to find the foreach index?
... each run-through, which is exactly what the for loop gives you in a numerically-indexed array. Such a field would be a pseudo-index that needs manual management (increments, etc).
A foreach will give you your index in the form of your $key value, so such a hack shouldn't be necessary.
e.g., in a ...
Delete files older than 3 months old in a directory using .NET
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What does the .ToList() call add other than a second loop through the matched files?
– Joel Mueller
Feb 8 '10 at 21:23
2
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What is the difference between the dot (.) operator and -> in C++? [duplicate]
...ow operator is like dot, except it dereferences a pointer first. foo.bar() calls method bar() on object foo, foo->bar calls method bar on the object pointed to by pointer foo.
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Pandas DataFrame Groupby two columns and get counts
...ter,
You need to provide one more column which counts the grouping, let's call that column as, "COUNTER" in dataframe.
Like this:
df['COUNTER'] =1 #initially, set that counter to 1.
group_data = df.groupby(['Alphabet','Words'])['COUNTER'].sum() #sum function
print(group_data)
OUTPUT:
...
How to print like printf in Python3?
...eses, you're trying to insert your variables into the result of your print call. print(...) returns None, so this won't work, and there's also the small matter of you already having printed your template by this time and time travel being prohibited by the laws of the universe we inhabit.
The whole...
How do I make my GUI behave well when Windows font scaling is greater than 100%
...areness is only important to me when it becomes important to customers who call me and are willing to pay for it. The technical reason behind that point of view is that DPI-awareness or not, you are opening a window into a world of hurt. Many standard and third party VCL controls do not work well ...
Why is there no xrange function in Python3?
... xrange function has nothing to do with it. (Not surprising, as a one-time call to the __iter__ slot isn't likely to be visible among 10000000 calls to whatever happens in the loop, but someone brought it up as a possibility.)
But it's only 30% slower. How did the OP get 2x as slow? Well, if I repe...
__attribute__ - C/C++ - 清泛网 - 专注C/C++及内核技术
...是无效的。）
void __cyg_profile_func_enter(void *this_fn, void *call_site);
void __cyg_profile_func_exit(void *this_fn, void *call_site);
其中，第一个参数this_fn是当前函数的起始地址，可在符号表中找到；第二个参数call_site是指调用处地址。
instru...
Do rails rake tasks provide access to ActiveRecord models?
...sks task_one task_two task_three
You'll get a stub created in lib/tasks called my_tasks.rake (obviously use your own namespace.) Which will look like this:
namespace :my_tasks do
desc "TODO"
task :task_one => :environment do
end
desc "TODO"
task :task_two => :environment do ...