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uppercase first character in a variable with bash
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15 Answers
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List all indexes on ElasticSearch server?
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edited Aug 14 '19 at 8:36
saeedeh
811010 bronze badges
answered Jul 2 '13 at 15:20
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How to stop /#/ in browser with react-router?
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For the versions 1, 2 and 3 of react-router, the correct way to set the route to URL mapping scheme is by passing a history implementation into the history parameter of <Router>. From the histories documentation:
In a nutshell, a hi...
How to undo 'git reset'?
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Short answer:
git reset 'HEAD@{1}'
Long answer:
Git keeps a log of all ref updates (e.g., checkout, reset, commit, merge). You can view it by typing:
git reflog
Somewhere in this list is the commit that you lost. Let's say you just typed git reset HE...
Check if value exists in Postgres array
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Simpler with the ANY construct:
SELECT value_variable = ANY ('{1,2,3}'::int[])
The right operand of ANY (between parentheses) can either be a set (result of a subquery, for instance) or an array. There are several ways to use it:
SQLAlchemy: how to filter on PgArray column types?
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What is the JSF resource library for and how should it be used?
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1 Answer
1
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Anonymous recursive PHP functions
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$factorial = function( $n ) use ( &$factorial ) {
if( $n == 1 ) return 1;
return $factorial( $n - 1 ) * $n;
};
print $factorial( 5 );
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How to get a key in a JavaScript object by its value?
...ct).find(key => object[key] === value);
}
const map = {"first" : "1", "second" : "2"};
console.log(getKeyByValue(map,"2"));
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foll...
What's the $unwind operator in MongoDB?
... the following:
db.article.aggregate(
{ $project : {
author : 1 ,
title : 1 ,
tags : 1
}},
{ $unwind : "$tags" }
);
would return the following documents:
{
"result" : [
{
"_id" : ObjectId("4e6e4ef557b77501a49233f6"),
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What's valid and what's not in a URI query?
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edited Aug 19 '14 at 17:31
yonran
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