大约有 30,000 项符合查询结果（耗时：0.0483秒） [XML]
List of all index & index columns in SQL Server DB
...ers, and the XML type
-- add select where indid<255 and si.status&64=0 (to omit the text/image index and autostats)
If your names include spaces, add square brackets around them in the creation scripts.
When the last Key column is all nulls, you know that none are missing.
Filtering out...
Python ElementTree module: How to ignore the namespace of XML files to locate matching element when
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el.tag = postfix # strip all namespaces
root = it.root
This is based on the discussion here:
http://bugs.python.org/issue18304
Update: rpartition instead of partition makes sure you get the tag name in postfix even if there is no namespace. Thus you could condense it:
for _, el in it:
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Is there a way to 'uniq' by column?
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To consider multiple column.
Sort and give unique list based on column 1 and column 3:
sort -u -t : -k 1,1 -k 3,3 test.txt
-t : colon is separator
-k 1,1 -k 3,3 based on column 1 and column 3
share
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CMake: Print out all accessible variables in a script
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based on @sakra
function(dump_cmake_variables)
get_cmake_property(_variableNames VARIABLES)
list (SORT _variableNames)
foreach (_variableName ${_variableNames})
if (ARGV0)
unset(MATCHED)
...
How to print an exception in Python?
... are going to print the exception, it is better to use print(repr(e)); the base Exception.__str__ implementation only returns the exception message, not the type. Or, use the traceback module, which has methods for printing the current exception, formatted, or the full traceback.
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How to select rows from a DataFrame based on column values?
How to select rows from a DataFrame based on values in some column in Pandas?
10 Answers
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Cleaner way to update nested structures
...tire data structure, according to some strategy (top-down, bottom-up), and based on rules that match against the value at some point in the structure. The classical example is transforming an AST for a language, perhaps to evaluate, simplify, or collect information. Kiama supports Rewriting, see the...
Can I implement an autonomous `self` member type in C++?
...oo)
{
/* ... */
};
You can even do multiple inheritance with as many base classes as you want (thanks to variadic templates and variadic macros):
class WITH_SELF(Foo2)
{
/* ... */
};
class WITH_SELF_DERIVED(Bar2,Foo,Foo2)
{
/* ... */
};
I have verified this to work on gcc 4.8 and c...
How to move a model between two Django apps (Django 1.7)
...include these operations.
class Migration(migrations.Migration):
database_operations = [migrations.AlterModelTable('TheModel', 'newapp_themodel')]
state_operations = [migrations.DeleteModel('TheModel')]
operations = [
migrations.SeparateDatabaseAndState(
database_operat...
Iterate over the lines of a string
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1000 loops, best of 3: 406 usec per loop
not quite as good as the .find based approach -- still, worth keeping in mind because it might be less prone to small off-by-one bugs (any loop where you see occurrences of +1 and -1, like my f3 above, should automatically trigger off-by-one suspicions -- ...