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How do I check if a number is a palindrome?
... dig;
num = num / 10;
}
If n == rev then num is a palindrome:
cout << "Number " << (n == rev ? "IS" : "IS NOT") << " a palindrome" << endl;
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Entity Framework select distinct name
...
Using lambda expression..
var result = EFContext.TestAddresses.Select(m => m.Name).Distinct();
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How to remove all null elements from a ArrayList or String Array?
...any exception.
public static String[] clean(final String[] v) {
List<String> list = new ArrayList<String>(Arrays.asList(v));
list.removeAll(Collections.singleton(null));
return list.toArray(new String[list.size()]);
}
...
Add spaces before Capital Letters
...t.Length * 2);
newText.Append(text[0]);
for (int i = 1; i < text.Length; i++)
{
if (char.IsUpper(text[i]))
if ((text[i - 1] != ' ' && !char.IsUpper(text[i - 1])) ||
(preserveAcronyms && char.IsUpper(text[i - 1...
Does “\d” in regex mean a digit?
...ticular symbol.
>>> import re
>>> re.match(r'\d', '3')
<_sre.SRE_Match object at 0x02155B80>
>>> re.match(r'\d', '2')
<_sre.SRE_Match object at 0x02155BB8>
>>> re.match(r'\d', '1')
<_sre.SRE_Match object at 0x02155B80>
...
Android Studio rendering problems
...e specify the API level, Well it supposed to be 19 , But mine was showing <null>. But I resolved that I updated the gradle to 2.0 and changed the gradle home rebuild the project and restart the studio and now its showing 19...so All set here
– Nipun David
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ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C++内核技术
...ument)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='https://www.tsingfun.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)]; 本文源自互联网，采用知识共享署名-非商业性使用 4.0 国际许...
Copying text outside of Vim with set mouse=a enabled
...y also want to :set paste to avoid unexpected effects).
OS X (mac):
hold alt/option while selecting (source)
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Extract a regular expression match
...':
‘regmatches’ for extracting matched substrings based on the results of
‘regexpr’, ‘gregexpr’ and ‘regexec’.
So this will work, and is fairly simple:
txt <- "aaa12xxx"
regmatches(txt,regexpr("[0-9]+",txt))
#[1] "12"
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How to split data into training/testing sets using sample function
...re is a simple example:
data(mtcars)
## 75% of the sample size
smp_size <- floor(0.75 * nrow(mtcars))
## set the seed to make your partition reproducible
set.seed(123)
train_ind <- sample(seq_len(nrow(mtcars)), size = smp_size)
train <- mtcars[train_ind, ]
test <- mtcars[-train_ind, ...