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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...cle (and I believe a version of this also appeared in CACM) shows how link order and OS environment size changes alone were sufficient to shift performance significantly. They attribute this to alignment of "hot loops".
This paper, titled "Producing wrong data without doing anything obviously wron...
Import SQL file into mysql
...ILE.
I copied my file mydb.sq to directory C: .It should be capital C: in order to run
and that's it.
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convert '1' to '0001' in JavaScript [duplicate]
...' in JavaScript without using any 3rd party libraries. I have done this in php using spritf: $time = sprintf('%04.0f',$time_arr[$i]);
...
What is the largest Safe UDP Packet Size on the Internet
...s inside of another protocol such as IPsec (used for VPNs and the like) in order to route the packet to its destination. So if you do not know the MTU on your particular network path, it is best to leave a reasonable margin for other header information that you may not have anticipated. A 512-byte...
How to execute a raw update sql with dynamic binding in rails
...getting composite_primary_keys to function with activerecord 2.3.8. So in order to access the sqlserver 2000 table with a composite primary key, raw sql was required.
sql = "update [db].[dbo].[#{Contacts.table_name}] " +
"set [COLUMN] = 0 " +
"where [CLIENT_ID] = '#{contact.CLIENT_ID}'...
Efficiently updating database using SQLAlchemy ORM
...t at times doing a large query and then iterating in python can be up to 2 orders of magnitude faster than lots of queries. I assume that iterating over the query object is less efficient than iterating over a list generated by the all() method of the query object.
[Please note comment below - thi...
Difference between addSubview and insertSubview in UIView class
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Using insertSubView: you can specify the index, which determines z-order of views. A view with a higher index lies above those with lower indices.
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Ensure that HttpConfiguration.EnsureInitialized()
...ith attribute based routing and DI configuration together with the correct order of calling the configurations. I also uses MS ApiVersioning, where I needed the DI injections done before the first route hits the versioning attributes. Thx a lot
– Silvos
Jan 9 '...
Python, remove all non-alphabet chars from string
...ąć1-2!Абв3§4“5def”')) to get the same result.
In Python re, in order to match any Unicode letter, one may use the [^\W\d_] construct (Match any unicode letter?).
So, to remove all non-letter characters, you may either match all letters and join the results:
result = "".join(re.findall(r...
Advantages of std::for_each over for loop
..._each could be useful, especially if you have several functions to call in order but need to run each method for all objects before next... but maybe that's just me. ;)
Update 2: I've written my own one-liner wrappers of stl-algos that work with ranges instead of pair of iterators. boost::range_ex, ...