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LINQ where vs takewhile
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Say you have an array that contains [1, 3, 5, 7, 9, 0, 2, 4, 6, 8]. Now:
var whereTest = array.Where(i => i <= 5); will return [1, 3, 5, 0, 2, 4].
var whileTest = array.TakeWhile(i => i <= 5); will return [1, 3, 5].
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How to delete duplicate lines in a file without sorting it in Unix?
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awk '!seen[$0]++' file.txt
seen is an associative-array that Awk will pass every line of the file to. If a line isn't in the array then seen[$0] will evaluate to false. The ! is the logical NOT operator and will invert the false to true. Awk will print the lines where the ex...
Join strings with a delimiter only if strings are not null or empty
...s great, but it doesn't work in older browsers like IE8 due to the lack of Array.prototype.filter() in their JavaScript engines.
For those who are interested in an efficient solution working in a wide range of browsers (including IE 5.5 - 8) and which doesn't require jQuery, see below:
var join = ...
Is there a generator version of `string.split()` in Python?
...ormed, this should be minimal since strings are represented as continguous arrays in memory.
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How can I iterate over an enum?
...t, I was getting obnoxious Error in range-based for... errors (because the array had an unknown size). Figured this out thanks to a related answer
– sage
Mar 4 '15 at 5:47
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Rails: fields_for with index?
... end
else
record_object = record_name.is_a?(Array) ? record_name.last : record_name
record_name = ActiveModel::Naming.param_key(record_object)
end
index = if options.has_key?(:index)
options[:index]
elsif...
Reference — What does this symbol mean in PHP?
... @AcidShout $a - $b works for numbers, but not strings, objects, or arrays.
– mcrumley
Sep 25 '15 at 18:29
49
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Is “argv[0] = name-of-executable” an accepted standard or just a common convention?
...ion before that states:
If the value of argc is greater than zero, the array members argv[0] through argv[argc-1] inclusive shall contain pointers to strings, which are given implementation-defined values by the host environment prior to program startup.
This is unchanged from C99, the previou...
Looping through the content of a file in Bash
...ld look something like read -r X <&3.
Reading a whole file into an array (Bash versions earlier to 4)
while read -r line; do
my_array+=("$line")
done < my_file
How to extract a string using JavaScript Regex?
...nt the matching group (what's
inside the parenthesis) rather than
the full array? arr[0] is
the full match ("\nSUMMARY:...") and
the next indexes contain the group
matches.
String.match(regexp) is
supposed to return an array with the
matches. In my browser it doesn't (Safari on Mac returns only the ...