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How to get the first line of a file in a bash script?
...thod doesn't work as written, because read doesn't print anything (so line winds up blank), and also executes in a subshell (so FIRSTLINE gets set to the first line, but only in the subshell, so it's not available afterward). Solution: just use read -r line <filename
– Gord...
what is faster: in_array or isset? [closed]
...as testing while and foreach that at each refresh I was getting different "winners". it always depend on too many server variables, and the best is to iterate a very large number of times on different times and get the one that win more often, or just know what happening in the background and know ...
Oracle SQL: Update a table with data from another table
...s will occur in an unpredictable manner (i.e. last value in unordered data wins). Thirdly: It will be much slower. Assuming the outcome of the for loop was intended, the original subselect could have been rewritten in some controlled way to return only 1 value for each record... simplest contrived w...
How to force LINQ Sum() to return 0 while source collection is empty
Basically when I do the following query, if no leads were matched the following query throws an exception. In that case I'd prefer to have the sum equalize 0 rather than an exception being thrown.
Would this be possible in the query itself - I mean rather than storing the query and checking query.A...
Should an Enum start with a 0 or a 1?
Imagine I have defined the following Enum:
14 Answers
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Vagrant error : Failed to mount folders in Linux guest
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Using a Win 7 box with Vagrant 1.3.5 and VirtualBox 4.3.10, answer #1 did not work for me. I still got the unable to mount ... errors
– Kevin Meredith
Apr 16 '14 at 16:17
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Insert line after first match using sed
...d values.
Its getting long enough though that I think perl/even awk might win due to being more readable.
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Eclipse shortcut “go to line + column”
... + L
It you want more short-cuts, refer http://www.shortcutworld.com/en/win/Eclipse.html
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Get all unique values in a JavaScript array (remove duplicates)
... ECMAScript 5 you can use the native filter method of an Array in the following way to get an array with unique values:
function onlyUnique(value, index, self) {
return self.indexOf(value) === index;
}
// usage example:
var a = ['a', 1, 'a', 2, '1'];
var unique = a.filter(onlyUnique);
consol...
insert multiple rows via a php array into mysql
...ion; instead, PHP does this once in the implode() statement. This is a big win.
If you have lots of columns to put together, and one or more are very long, you could also build an inner loop to do the same thing and use implode() to assign the values clause to the outer array.
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