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Java: function for arrays like PHP's join()?
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Starting from Java8 it is possible to use String.join().
String.join(", ", new String[]{"Hello", "World", "!"})
Generates:
Hello, World, !
Otherwise, Apache Commons Lang has a StringUtils class which has a join function which will join arrays togethe...
What is Bit Masking?
I am fairly new to C programming, and I encountered bit masking. Can someone explain to me the general concept and function of bit masking? Examples are much appreciated.
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Max length UITextField
When I've tried How to you set the maximum number of characters that can be entered into a UITextField using swift? , I saw that if I use all 10 characters, I can't erase the character too.
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Implode an array with JavaScript?
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John
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answered Nov 10 '10 at 17:03
jon_darkstarjon_darkstar
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How to export all collections in MongoDB?
I want to export all collections in MongoDB by the command:
26 Answers
26
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Linux - Install redis-cli only
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Ubuntu (tested on 14.04) has package called redis-tools which contains redis-cli among other tools.
To install it type:
sudo apt-get install redis-tools
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Showing a Spring transaction in log
... the logging level of the spring framework so that it gives you more info about transactions. For example, in case of using JpaTransactionManager, you set
log4j.logger.org.springframework.orm.jpa=INFO
(this is the package of the your transaction manager), and also
log4j.logger.org.springframewor...
How can I increment a date by one day in Java?
...r.getInstance();
c.setTime(sdf.parse(dt));
c.add(Calendar.DATE, 1); // number of days to add
dt = sdf.format(c.getTime()); // dt is now the new date
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How to convert an image to base64 encoding?
Can you please guide me how can I convert an image from a URL to base64 encoding?
9 Answers
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How to find nth occurrence of character in a string?
...an use StringUtils.ordinalIndexOf, otherwise, here's an implementation:
public static int ordinalIndexOf(String str, String substr, int n) {
int pos = str.indexOf(substr);
while (--n > 0 && pos != -1)
pos = str.indexOf(substr, pos + 1);
return pos;
}
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