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How to find whether or not a variable is empty in Bash
...are not useless, if I do not inlcude I ma getting ./test.ksh[8]: test: argument expected dunnot the reason but single bracket didn't work but the double one had it.
– gahlot.jaggs
Oct 4 '13 at 7:24
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Delete first character of a string in Javascript
...exceeds the index of the last character, so there's no type coercion performed, and the algorithm ends up being identical. But I do prefer === over == even when it doesn't make a difference. ;)
– user113716
Oct 17 '11 at 21:32
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How to randomly pick an element from an array
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I wouldn't create Random() each time you run the function: the random generator is supposed to have history. If it haven't, it's extremely predictable. It's not a problem at all in this case — but it should be mentioned that array[(int)(System.currentTimeMi...
How do I put an 'if clause' in an SQL string?
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How can I programmatically create a new cron job?
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It's always worked well for me.
You should consider a slightly more sophisticated script that can do three things.
Append a crontab line; assuring that it didn't exist. Adding when it already exists is bad.
Remove the crontab line. Perhaps only war...
Getting an “ambiguous redirect” error
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Bash can be pretty obtuse sometimes.
The following commands all return different error messages for basically the same error:
$ echo hello >
bash: syntax error near unexpected token `newline`
$ echo hello > ${NONEXISTENT}
bash: ${NONEXISTENT}: ...
Prevent flicker on webkit-transition of webkit-transform [duplicate]
For some reason, right before my animation of the webkit-transform property occurs, there is a slight flicker. Here is what I am doing:
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Java: parse int value from a char
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Try Character.getNumericValue(char).
String element = "el5";
int x = Character.getNumericValue(element.charAt(2));
System.out.println("x=" + x);
produces:
x=5
The nice thing about getNumericValue(char) is that it also works with strings l...
Do I need Content-Type: application/octet-stream for file download?
...n safely do with application/octet-stream is to save it to file and hope someone else knows what it's for.
You can combine the use of Content-Disposition with other content-types, such as image/png or even text/html to indicate you want saving rather than display. It used to be the case that some b...
How to get NSDate day, month and year in integer format?
...an integer. How can I do this in iOS? I found the similar question but the method descriptionWithCalendarFormat : gives a warning and seems to be deprecated by now.
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