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Format numbers to strings in Python
...2d" % (12, 7, 41)
'MM/DD/YY = 12/07/41'
>>> 'Total with tax: $%.2f' % (13.00 * 1.0825)
'Total with tax: $14.07'
>>> d = {'web': 'user', 'page': 42}
>>> 'http://xxx.yyy.zzz/%(web)s/%(page)d.html' % d
'http://xxx.yyy.zzz/user/42.html'
Here are the equivalent snippet...
Currency formatting in Python
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New in 2.7
>>> '{:20,.2f}'.format(18446744073709551616.0)
'18,446,744,073,709,551,616.00'
http://docs.python.org/dev/whatsnew/2.7.html#pep-0378
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slashes in url variables
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You need to escape the slashes as %2F.
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What's the complete range for Chinese characters in Unicode?
...ble variants, corporate characters
CJK Compatibility Ideographs Supplement 2F800-2FA1F Unifiable variants
Note: the block ranges can evolve over time: latest is in CJK Unified Ideographs.
See also Wikipedia:
CJK Unified Ideographs Extension A
CJK Unified Ideographs Extension B
CJK Unified Ideograp...
Do I encode ampersands in ?
...
https://example.com/?user=test&password&te%26st&goto=https%3A%2F%2Fgoogle.com
Example fully legit URL in value of HTML attribute:
https://example.com/?user=test&password&te%26st&goto=https%3A%2F%2Fgoogle.com
Also important scenarios:
Javascript as a value:...
No newline at end of file
...A() {
// do something
}
Hexdump:
00000000: 4128 2920 7b0a 2020 2020 2f2f 2064 6f20 A() {. // do
00000010: 736f 6d65 7468 696e 670a 7d something.}
You now edit it to
A() {
// do something
}
// Useful comment
Hexdump:
00000000: 4128 2920 7b0a 2020 2020 2f2f 2064 6f20...
How do I hide javascript code in a webpage?
...22%73%74%79%6C%65%73%68%65%65%74%22%20%68%72%65%66%3D%22%73%74%79%6C%65%73%2F%63%73%73%2E%63%73%73%22%20%74%79%70%65%3D%22%74%65%78%74%2F%63%73%73%22%20%6D%65%64%69%61%3D%22%73%63%72%65%65%6E%22%20%2F%3E%0A%3C%73%63%72%69%70%74%20%74%79%70%65%3D%22%74%65%78%74%2F%6A%61%76%61%73%63%72%69%70%74%22%20%...
How to work with complex numbers in C?
..."Working with complex numbers:\n\v");
printf("Starting values: Z1 = %.2f + %.2fi\tZ2 = %.2f %+.2fi\n", creal(z1), cimag(z1), creal(z2), cimag(z2));
double complex sum = z1 + z2;
printf("The sum: Z1 + Z2 = %.2f %+.2fi\n", creal(sum), cimag(sum));
double complex difference = z1 - z2...
String formatting in Python 3
...at(self)
"second goal: {.goal_list[1]}".format(self)
"conversion rate: {:.2f}".format(self.goals / self.shots) # '0.20'
"conversion rate: {:.2%}".format(self.goals / self.shots) # '20.45%'
"conversion rate: {:.0%}".format(self.goals / self.shots) # '20%'
"self: {!s}".format(self) # 'Player: Bob'
"...
Pythonic way to find maximum value and its index in a list?
... "l = [random.random() for _ in xrange(100)]")
print "Explicit: %.2f usec/pass" % (1000000 * t.timeit(number=100000)/100000)
t = Timer("implicit(l)", "from __main__ import explicit, implicit; "
"import random; import operator;"
"l = [random.random() for _ in xrange(...