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Run an untrusted C program in a sandbox in Linux that prevents it from opening files, forking, etc.?
...he tcc C-compiler):
wget https://github.com/levskaya/jslinux-deobfuscated/raw/master/root.bin
We want to put the student's submission in root.bin, so set up the loop device:
sudo losetup /dev/loop0 root.bin
(you could use fuseext2 for this too, but it's not very stable. If it stabilizes, you won'...
Do I cast the result of malloc?
...e (alleged) desired type right next to the arithmetic you're doing for the raw size of that variable. I bet you could do an SO study that shows that malloc() bugs are caught much faster when there's a cast. As with assertions, annotations that reveal intent decrease bugs.
Repeating yourself in a wa...
Using arrays or std::vectors in C++, what's the performance gap?
... a std::array.
Uninitialized memory
Sometimes, using a vector instead of a raw buffer incurs a visible cost because the vector will initialize the buffer at construction, while the code it replaces didn't, as remarked bernie by in his answer.
If this is the case, then you can handle it by using a un...
Clean ways to write multiple 'for' loops
... your job of defining objects with clear semantics.
If you decided to use raw data like 3 dimensional arrays, just live with it, or else define a class that gives some understandable meaning to your data.
for (auto& k : A)
for (auto& i : k)
for (auto& current_A : i)
do_something_on...
jQuery animate backgroundColor
... remove the color-to-rgb mappings in the code and reduce the size further: raw.github.com/gist/1891361/… . The downside is that you cannot use color names for animation. You will have to use rgb values.
– Niyaz
Feb 23 '12 at 7:44
...
what is the difference between OLE DB and ODBC data sources?
... both relational and non-relational databases. (Oracle, Sql-Server, Excel, raw files, etc)
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Difference between numpy.array shape (R, 1) and (R,)
... is that they consist of two parts, a data buffer which is just a block of raw elements, and a view which describes how to interpret the data buffer.
For example, if we create an array of 12 integers:
>>> a = numpy.arange(12)
>>> a
array([ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 1...
HTML5 record audio to file
...nk length */
view.setUint32(16, 16, true);
/* sample format (raw) */
view.setUint16(20, 1, true);
/* channel count */
view.setUint16(22, 2, true);
/* sample rate */
view.setUint32(24, sampleRate, true);
/* byte rate (sample rate * block align) ...
AES Encryption for an NSString on the iPhone
... it's transmittable without being disturbed in transit, rather than return raw data.
– Volomike
Jan 17 '16 at 1:24
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How to use an existing database with an Android application [duplicate]
... String sql ="SELECT * FROM myTable";
Cursor mCur = mDb.rawQuery(sql, null);
if (mCur != null) {
mCur.moveToNext();
}
return mCur;
} catch (SQLException mSQLException) {
Log.e(TAG, "getTestData >>"+...