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How to write a bash script that takes optional input arguments?
...s an empty string), use this syntax instead:
somecommand ${1-foo}
Again from Bash Reference Manual - 3.5.3 Shell Parameter Expansion:
Omitting the colon results in a test only for a parameter that is unset. Put another way, if the colon is included, the operator tests for both parameter’s e...
php is null or empty?
... is an empty string, false is a boolean, $a = 0; is an integer and null is from type null. What OP is telling is that PHP will thread them as "same" in value, but not as "same" in type. So a strict === check will also check for type and fail if you use different ones. That's the reason you should be...
Interfaces vs. abstract classes [duplicate]
...s. However, they are typically more flexible as a type can only be derived from one class, but can implement any number of interfaces.
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Best way to compare dates in Android
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You can directly create a Calendar from a Date:
Calendar validDate = new GregorianCalendar();
validDate.setTime(strDate);
if (Calendar.getInstance().after(validDate)) {
catalog_outdated = 1;
}
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Position absolute but relative to parent
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Is there a stopwatch in Java?
... Quick and easy, thank you very much! Helps keep track of task duration from start.
– ndm13
Jan 19 '16 at 18:20
Wha...
Scripting Language vs Programming Language [closed]
...examples for each. I have Googled a lot but I always find the best answers from Stack Overflow.
14 Answers
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How to get only the last part of a path in Python?
...ointed out, making changes so as to accomodate trailing '/'.
>>> from os.path import normpath, basename
>>> basename(normpath('/folderA/folderB/folderC/folderD/'))
'folderD'
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In php, is 0 treated as empty?
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From a linguistic point of view empty has a meaning of without value. Like the others said you'll have to use isset() in order to check if a variable has been defined, which is what you do.
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T-SQL Cast versus Convert
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