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Convert char to int in C and C++
... unsigned, and char) is more delicate than it first appears. Values in the range 0 to SCHAR_MAX (which is 127 for an 8-bit char) are easy:
char c = somevalue;
signed char sc = c;
unsigned char uc = c;
int n = c;
But, when somevalue is outside of that range, only going through unsigned char gives ...
How to write to an existing excel file without overwriting data (using pandas)?
...17-08','2017-09','2017-10','2017-11','2017-12']
value1 = [x * 5+5 for x in range(len(months))]
df = pd.DataFrame(value1, index = months, columns = ['value1'])
df['value2'] = df['value1']+5
df['value3'] = df['value2']+5
#load workbook that has a chart in it
wb = xw.Book('C:\\data\\bookwithChart.xlsx...
What's the best way to make a d3.js visualisation layout responsive?
...olution that does not rely on using a viewBox:
The key is in updating the range of the scales which are used to place data.
First, calculate your original aspect ratio:
var ratio = width / height;
Then, on each resize, update the range of x and y:
function resize() {
x.rangeRoundBands([0, w...
Trim spaces from end of a NSString
...ngByTrimmingTrailingCharactersInSet:(NSCharacterSet *)characterSet {
NSRange rangeOfLastWantedCharacter = [self rangeOfCharacterFromSet:[characterSet invertedSet]
options:NSBackwardsSearch];
if (rangeOfLastWantedCharacter.locatio...
Why doesn't C have unsigned floats?
I know, the question seems to be strange. Programmers sometimes think too much. Please read on...
12 Answers
...
Filter dict to contain only certain keys?
...h a dictionary of 26 items (timeit(..., setup="d = {chr(x+97):x+1 for x in range(26)}")), depending on how many items are being filtered out (filtering out consonant keys is faster than filtering out vowel keys because you're looking up fewer items). The difference in performance may very well becom...
Remove last character from string. Swift language
...int(name) // "Dolphin"
print(truncated) // "Dolphi"
Using the removeRange() method (which alters the name):
var name: String = "Dolphin"
name.removeAtIndex(name.endIndex.predecessor())
print(name) // "Dolphi"
Using the dropLast() function:
var name: String = "Dolphin"
var truncated = ...
Performance of Find() vs. FirstOrDefault() [duplicate]
...<string>> source = Enumerable.ToList(Enumerable.Select(Enumerable.Range(0, 1000000), i =>
{
var local_0 = new
{
Name = Guid.NewGuid().ToString()
};
return local_0;
}));
source.Insert(999000, new
{
Name = diana
});
stopwatch.Re...
What is the most pythonic way to check if an object is a number?
...lowing output:
class A: pass
def foo(): return 1
for x in [1,1.4, A(), range(10), foo, foo()]:
answer = isNumber(x)
print('{answer} == isNumber({x})'.format(**locals()))
Output:
True == isNumber(1)
True == isNumber(1.4)
False == isNumber(<__main__.A instance at 0x7ff52c15d878>)
...
Is there a way to 'uniq' by column?
... first two fields. My awk-fu isn't strong enough to be able to unique on a range of fields, though. :(
– Soham Chowdhury
Jan 29 '17 at 6:43
...