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Fastest way to check if a string matches a regexp in ruby?
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This is a simple benchmark:
require 'benchmark'
"test123" =~ /1/
=> 4
Benchmark.measure{ 1000000.times { "test123" =~ /1/ } }
=> 0.610000 0.000000 0.610000 ( 0.578133)
"test123"[/1/]
=> "1"
Benchmark.measure{ 1000000.times { "test123"[/1/] } }
=> 0.718000 ...
Python-equivalent of short-form “if” in C++ [duplicate]
Is there a way to write this C/C++ code in Python?
a = (b == true ? "123" : "456" )
4 Answers
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Converting a string to an integer on Android
...th4number";
int i=Integer.parseInt(s.replaceAll("[\\D]", ""));
output:
i=1234;
If you need first number combination then you should try below code:
String s="abc123xyz456";
int i=NumberFormat.getInstance().parse(s).intValue();
output:
i=123;
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How to remove certain characters from a string in C++?
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// output: 555 5555555
cout << str << endl;
To use as function:
void removeCharsFromString( string &str, char* charsToRemove ) {
for ( unsigned int i = 0; i < strlen(charsToRemove); ++i ) {
str.erase( remove(str.begin(), str.end(), charsToRemove[i]), str.end() )...
Java EE web development, where do I start and what skills do I need? [closed]
...JSF 2.3 available.
Last but not least, please ignore code snippet scraping sites maintained by amateurs with primary focus on advertisement income instead of on teaching, such as roseindia, tutorialspoint, javabeat, journaldev, javatpoint, codejava, etc. They are easily recognizable by disturbing ad...
Use cases for NoSQL [closed]
...ularly regarding concurrency. There are case studies at the MongoDB.org website that demonstrate those attributes.
I agree with the notion that each database has its own aims and use cases; take the purpose of each database for evaluation accordingly.
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Programmatically set left drawable in a TextView
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Using Kotlin:
You can create an extension function or just use setCompoundDrawablesWithIntrinsicBounds directly.
fun TextView.leftDrawable(@DrawableRes id: Int = 0) {
this.setCompoundDrawablesWithIntrinsicBounds(id, 0, 0, 0)
}
If you need to resize the drawable...
JavaScript for…in vs for
...ers#Summary_table, and according to marketshare.hitslink.com/… and other sites, at least 8% of browsers are IE 9. In other words, Array.forEach is supported by around 70% of desktop browsers, so I don't think 'widely supported' is unreasonable. I haven't checked, but mobile support (on WebKit and ...
How to extract base URL from a string in JavaScript?
... Got it - thanks Rafal and daddywoodland! I ended up using: url = 'sitename.com/article/2009/09/14/this-is-an-article'; pathArray = (url).split('/'); host = 'http://' + pathArray[2]; I think Rafal's example just omitted the "http://" that is present in all of the strings that I'm pro...
C# Regex for Guid
...g styles, which are all equivalent and acceptable formats for a GUID.
ca761232ed4211cebacd00aa0057b223
CA761232-ED42-11CE-BACD-00AA0057B223
{CA761232-ED42-11CE-BACD-00AA0057B223}
(CA761232-ED42-11CE-BACD-00AA0057B223)
Update 1
@NonStatic makes the point in the comments that the above regex will ...