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Invalid argument supplied for foreach()
It often happens to me to handle data that can be either an array or a null variable and to feed some foreach with these data.
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MySQL: determine which database is selected?
...ly selected? This seems very basic but I couldn't find anything on php.net or stackoverflow (all results are for "no database selected").
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how to use sed, awk, or gawk to print only what is matched?
... and man pages on how to do things like search-and-replace using sed, awk, or gawk.
11 Answers
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How can I check if a URL exists via PHP?
... edited Sep 21 at 16:58
Theodore R. Smith
17.8k1212 gold badges4848 silver badges7474 bronze badges
answered Feb 17 '10 at 12:10
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In Python, when to use a Dictionary, List or Set?
When should I use a dictionary, list or set?
11 Answers
11
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Can unit testing be successfully added into an existing production project? If so, how and is it wor
...an existing project that is in production. It was started 18 months ago before I could really see any benefit of TDD (face palm) , so now it's a rather large solution with a number of projects and I haven't the foggiest idea where to start in adding unit tests. What's making me consider this is tha...
How to check if the user can go back in browser history or not
I want using JavaScript to see if there is history or not, I mean if the back button is available on the browser or not.
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Which is faster : if (bool) or if(int)?
...elps to illuminate that when choosing a variable type, you're choosing it for two potentially competing purposes, storage space vs. computational performance.
– Triynko
Apr 27 '11 at 18:20
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Search for executable files using find command
...ons of find you can use -executable:
find . -type f -executable -print
For BSD versions of find, you can use -perm with + and an octal mask:
find . -type f -perm +111 -print
In this context "+" means "any of these bits are set" and 111 is the execute bits.
Note that this is not identical to t...
What is the correct way to check for string equality in JavaScript?
What is the correct way to check for equality between Strings in JavaScript?
9 Answers
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