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What is the difference between square brackets and parentheses in a regex?
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These regexes are equivalent (for matching purposes):
/^(7|8|9)\d{9}$/
/^[789]\d{9}$/
/^[7-9]\d{9}$/
The explanation:
(a|b|c) is a regex "OR" and means "a or b or c", although the presence of brackets, necessary for the OR, also captures the digit. To be strictly equivalent, you...
Reading InputStream as UTF-8
...eader in = new BufferedReader(new InputStreamReader(url.openStream(), "UTF-8"));
or since Java 7:
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream(), StandardCharsets.UTF_8));
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Types in Objective-C on iOS
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The size of long is: 4.
The size of long long is: 8.
The size of a unsigned char is: 1.
The size of unsigned short is: 2.
The size of unsigned int is: 4.
The size of unsigned long is: 4.
The size of unsigned long long is: 8. ...
Mod of negative number is melting my brain
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287
I always use my own mod function, defined as
int mod(int x, int m) {
return (x%m + m)%m;
}...
How to compare two dates?
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edited Oct 8 '18 at 10:28
Thomas Decaux
17.3k22 gold badges7878 silver badges8282 bronze badges
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Encode String to UTF-8
...cter and I have some problems with it. I need to encode this String to UTF-8 encoding. I have tried it by this way, but it doesn't work:
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“please check gdb is codesigned - see taskgated(8)” - How to get gdb installed with homebrew code si
I'm under osx 10.8.4 and have installed gdb 7.5.1 with homebrew (motivation get a new gdb with new features such as --with-python etc... )
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Rounding DateTime objects
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edited Apr 8 '10 at 11:49
answered Sep 8 '09 at 12:27
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convert streamed buffers to utf8-string
...e binary contents to a string using a specific encoding. It defaults to utf8 if you don't provide a parameter, but I've explicitly set the encoding in this example.
var req = http.request(reqOptions, function(res) {
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res.on('data', function(chunk) {
var textChunk = chunk.toStrin...