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How to convert wstring into string?
... + ws.length(), from_next, &to[0], &to[0] + to.size(), to_next);
if (result == converter_type::ok or result == converter_type::noconv) {
const std::string s(&to[0], to_next);
std::cout <<"std::string = "<<s<<std::endl;
}
}
This will usually work for Li...
For files in directory, only echo filename (no path)
How do I go about echoing only the filename of a file if I iterate a directory with a for loop?
5 Answers
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RegEx to make sure that the string contains at least one lower case char, upper case char, digit and
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If you need one single regex, try:
(?=.*\d)(?=.*[a-z])(?=.*[A-Z])(?=.*\W)
A short explanation:
(?=.*[a-z]) // use positive look ahead to see if at least one lower case letter exists
(?=.*[A-Z]) // use positi...
Date ticks and rotation in matplotlib
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import numpy as np
import matplotlib.pyplot as plt
import datetime as dt
now = dt.datetime.now()
hours = [now + dt.timedelta(minutes=x) for x in range(0,24*60,10)]
days = [now + dt.timedelta(days=x) for x in np.arange(0,30,1/4.)]
hours_value = np.random.random(len(hours))
days_value = np.random.ra...
What are all the escape characters?
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\a does not compile in javac 1.8.0_20: illegal escape character: String test = "\a";
– Ehryk
Mar 15 '15 at 18:18
3
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Reference list item by index within Django template?
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If you're willing to create a custom tag, you can do a lot more. Here we're just working with the built-in stuff.
– Mike DeSimone
Apr 16 '15 at 13:55
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How do I return rows with a specific value first?
...ant my query to return the rows of the table where a column contains a specific value first, and then return the rest of the rows alphabetized.
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How do I strip non alphanumeric characters from a string and keep spaces?
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The bang version will return nil if nothing was matched. Probably not the result you'd want or expect. From the docs "Performs the substitutions of String#gsub in place, returning str, or nil if no substitutions were performed. If no block and no replacement...
How do I escape a percentage sign in T-SQL?
This question also has the answer , but it mentions DB2 specifically.
4 Answers
4
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Which parts of Real World Haskell are now obsolete or considered bad practice?
In the chapter 19 of Real World Haskell a lot of the examples now fail due to the change of Control.Exception .
1 Answer...