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Xamarin 2.0 vs Appcelerator Titanium vs PhoneGap [duplicate]
After all IDE evolutions (all platforms on topic are changed) of this year, i'm looking to understand what is the state of technology for those platforms.
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Apache: “AuthType not set!” 500 Error
...firing up a local server for a project and when I try to request localhost/index.html, I get a 500 error and I see this in the error log:
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Unique constraint that allows empty values in MySQL
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Yes, you can do this. See the MySQL reference (version 5.5).
A UNIQUE index creates a constraint such that all values in the index must be distinct. An error occurs if you try to add a new row with a key value that matches an existing row. For all engines, a UNIQUE index allows multiple NULL v...
Work on a remote project with Eclipse via SSH
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C/C++ indexing is not working properly with RSE. Indexer complains about missing symbols. It works well when the project and source files are stored locally but with RSE it does'nt. any ideas?
– Black_Zero
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Undo a git stash
... preserve the state of files (staged vs. working), use
git stash apply --index
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How can I open the interactive matplotlib window in IPython notebook?
...pyplot as plt
import seaborn as sns
ts = pd.Series(np.random.randn(1000), index=pd.date_range('1/1/2000', periods=1000))
ts = ts.cumsum()
df = pd.DataFrame(np.random.randn(1000, 4), index=ts.index,
columns=['A', 'B', 'C', 'D'])
df = df.cumsum()
df.plot(); plt.legend(loc='best') ...
Analyze audio using Fast Fourier Transform
...Nsamples;
float band_power = 0.0;
float harmonic_amplitude=0.0;
int i, out_index;
out_index=0;
for (i = 0; i < Nsamples / 2 + 1; i++)
{
if (i == 1 || i == 2 || i == 4 || i == 8 || i == 17 || i == 33 || i == 66 || i == 132 || i == 264 || i == 511)
{
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What do the result codes in SVN mean?
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SVN status columns
$ svn status
L index.html
The output of the command is split into six columns, but that is not obvious because sometimes the columns are empty. Perhaps it would have made more sense to indicate the empty columns with dashes, the way ls -l...
Eclipse: Set maximum line length for auto formatting?
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Note: Eclipse (Kepler, at least) very obnoxiously allows you to edit the built-in profile to your heart's content, only to stop you from saving it with an unobtrusive notification that you CAN'T edit built-in profiles, and must create a copy and edit that instead.
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Random record in ActiveRecord
...that using offset is very slow with large dataset, since it actually needs index scan (or table scan, in case clustered index is used like InnoDB). In other words, it's O(N) operation but "WHERE id >= #{rand_id} ORDER BY id ASC LIMIT 1" is O(log N), which is much faster.
– k...