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When to use StringBuilder in Java [duplicate]
It is supposed to be generally preferable to use a StringBuilder for string concatenation in Java. Is this always the case?
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Quick and easy file dialog in Python?
I have a simple script which parses a file and loads it's contents to a database. I don't need a UI, but right now I'm prompting the user for the file to parse using raw_input which is most unfriendly, especially because the user can't copy/paste the path. I would like a quick and easy way to pre...
Best way to reverse a string
I've just had to write a string reverse function in C# 2.0 (i.e. LINQ not available) and came up with this:
48 Answers
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Change app language programmatically in Android
...(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String languageToLoad = "fa"; // your language
Locale locale = new Locale(languageToLoad);
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext()....
Converting a generic list to a CSV string
I have a list of integer values (List) and would like to generate a string of comma delimited values. That is all items in the list output to a single comma delimted list.
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If I revoke an existing distribution certificate, will it mess up anything with existing apps?
...er weeks of trying to get the guy who has the key to sign the app, they finally came back and said, "Just get it done!". So I am wondering how to proceed. If I go into the provisioning portal, and revoke the dist certificate, and then re-assign one, will I then be able to sign the app and upload it ...
Default visibility of class methods in PHP
... access modifiers, so it's common to see no usage of them in legacy code.
And no, PHP has no package visibility, mainly because until recently PHP had no packages.
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JavaScript string newline character?
...ch(/\n/) ? 'LF' : ''));
}
log_newline('HTML source');
log_newline('JS string', "foo\nbar");
log_newline('JS template literal', `bar
baz`);
<textarea id="test" name="test">
</textarea>
IE8 and Opera 9 on Windows use \r\n. All the other browsers I tested (Safari 4 and Fir...
BLE协议—广播和扫描 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...广播方式的报文有4种，分别为可连接的非定向广播（ADV_IND）、可连接的定向广播（ADV_DIRECT_IND）、可扫描非定向广播（ADV_SCAN_IND）、不可连接的非定向广播（ADV_NONCONN_IND）
4种广播的使用场景各不相同
可连接的非定向广播（A...
Runnable with a parameter?
...ould be immediately rejected, and this would be suggested:
void foo(final String str) {
Thread t = new Thread(() -> someFunc(str));
t.start();
}
As before, details like handling that thread in a meaningful way is left as an exercise to the reader. But to put it bluntly, if you're afrai...