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How to get diff working like git-diff?
I like the output formatting of git diff . The color and the + / - representation of changes between lines is easier to read than GNU diff.
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Error: Could not find or load main class [duplicate]
...nsure that you add the location of your .class file to your classpath. So, if its in the current folder, add . to your classpath.
Note that the Windows classpath separator is a semi-colon, i.e. a ;.
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Bash script to calculate time elapsed
...e to this solution is that it only measures whole seconds, i.e. not usable if you need sub-second precision.
– Czechnology
Oct 27 '17 at 16:01
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How to modify PATH for Homebrew?
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This is also the best solution I've found if your problem is that RVM and Homebrew both seem to be competing for same real estate in your .bash_profile file.
– MCB
Feb 22 '14 at 18:14
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emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?
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There is no difference:
(eq 'my-add #'my-add)
yields t
The # can be used in front of a lambda expression indicating to the byte-compiler that the following expression can be byte compiled, see the docs for Anonymous Functions. But th...
How to find the size of an array in postgresql
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As vyegorov mentioned, array_length will do the trick. Or if you know that the array is 1-dimensional (which is likely) and are running PostgreSQL 9.4 or higher, you can use cardinality:
SELECT cardinality(id) FROM example;
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Check if a string is null or empty in XSLT
How can I check if a value is null or empty with XSL ?
14 Answers
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Javascript Reduce an empty array
...licitly provide an initial "accumulated" value as the second argument:
If no initialValue was provided, then previousValue will be equal to
the first value in the array and currentValue will be equal to the
second. It is a TypeError if the array contains no elements and
initialValue is not...
How to split a delimited string into an array in awk?
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@Mohamed Saligh, if you're on Solaris, you need to use /usr/xpg4/bin/awk, given the string length.
– Dimitre Radoulov
Nov 4 '11 at 13:54
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One-liner to take some properties from object in ES 6
...eturn Object.assign({}, ...props.map(prop => ({[prop]: o[prop]})));
}
If we want to preserve the properties' attributes, such as configurable and getters and setters, while also omitting non-enumerable properties, then:
function pick(o, ...props) {
var has = p => o.propertyIsEnumerable(...