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Difference between dict.clear() and assigning {} in Python
... the dict for many times.
import timeit
p1 = '''
d = {}
for i in xrange(1000):
d[i] = i * i
for j in xrange(100):
d = {}
for i in xrange(1000):
d[i] = i * i
'''
p2 = '''
d = {}
for i in xrange(1000):
d[i] = i * i
for j in xrange(100):
d.clear()
for i in xrange(10...
how to convert array values from string to int?
... @Dmitry - that's right.... it's an answer to the OP's question, not a 100% perfect in every case answer to every potential related question. OP had a string of comma-separated numeric values, not a pick-and mix of text and numbers
– Mark Baker
Oct 9 '13 at...
tinyxml XML解析库下载（tinyxml2.h 和 tinyxml2.cpp） - 源码下载 - 清泛...
...();
void CollapseWhitespace();
enum {
NEEDS_FLUSH = 0x100,
NEEDS_DELETE = 0x200
};
// After parsing, if *_end != 0, it can be set to zero.
int _flags;
char* _start;
char* _end;
};
/*
A dynamic array of Plain Old Data. Doesn't s...
jQuery get the location of an element relative to window
... ")");
});
#simplebox{
width:150px;
height:100px;
background: #FBBC09;
margin: 150px 100px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button type="button">Get Box Position<...
Responsively change div size keeping aspect ratio [duplicate]
...ormula (for example using a 22:5 ratio where 22 is A and 5 is B): B / (A / 100) = C%. So 22:5 is 5 / .22 = 22.72%.
– Dreamdealer
Mar 14 '14 at 13:21
1
...
CROSS JOIN vs INNER JOIN in SQL
...
Cross join does not combine the rows, if you have 100 rows in each table with 1 to 1 match, you get 10.000 results, Innerjoin will only return 100 rows in the same situation.
These 2 examples will return the same result:
Cross join
select * from table1 cross join table2 w...
Set 4 Space Indent in Emacs in Text Mode
...ote (4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 92 96 100 104 108 112 116 120))))
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Are the decimal places in a CSS width respected?
...ory and used for subsequent child calculation. For example, if your box of 100.4999px paints to 100px, it's child with a width of 50% will be calculated as .5*100.4999 instead of .5*100. And so on to deeper levels.
I've created deeply nested grid layout systems where parents widths are ems, and chi...
Dump a NumPy array into a csv file
...ne
with open('example.csv', 'w') as fp:
fp.write('''\
col1,col2,col3
1,100.1,string1
2,222.2,second string
''')
# Read it as a Numpy record array
ar = np.recfromcsv('example.csv')
print(repr(ar))
# rec.array([(1, 100.1, 'string1'), (2, 222.2, 'second string')],
# dtype=[('col1', '<...
How to wait until an element exists?
... clearInterval(existCondition);
doTheRestOfTheStuff(parameters);
}
}, 100); // check every 100ms
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