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Create an array with random values
...962890
function shuffle(array) {
var tmp, current, top = array.length;
if(top) while(--top) {
current = Math.floor(Math.random() * (top + 1));
tmp = array[current];
array[current] = array[top];
array[top] = tmp;
}
return array;
}
a = shuffle(a);
If you want to allow repeat...
How to check if mod_rewrite is enabled in php?
I was wondering if it is possible to check if mod_rewrite is enabled on Apache AND IIS in PHP .
15 Answers
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Why should I use var instead of a type? [duplicate]
...eneration of developers wouldn't stop complaining about it. My defense was if they had read and understood the code it didn't make any difference.I think it actually make things easier; if you refactor code and the types change you don't have to update your references to the whatever you've refactor...
Fast way to discover the row count of a table in PostgreSQL
I need to know the number of rows in a table to calculate a percentage. If the total count is greater than some predefined constant, I will use the constant value. Otherwise, I will use the actual number of rows.
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What's faster, SELECT DISTINCT or GROUP BY in MySQL?
If I have a table
15 Answers
15
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SQL join: selecting the last records in a one-to-many relationship
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If you want to include customers who never made a purchase, then change JOIN purchase p1 ON (c.id = p1.customer_id) to LEFT JOIN purchase p1 ON (c.id = p1.customer_id)
– GordonM
Dec 8 '1...
Remove a HTML tag but keep the innerHtml
...airly slow compared to .replacewith() because of the extra DOM traversal...if it's a <b> tag with only HTML it gets even faster.
– Nick Craver♦
Nov 20 '10 at 13:51
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C/C++ macro string concatenation
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If they're both strings you can just do:
#define STR3 STR1 STR2
The preprocessor automatically concatenates adjacent strings.
EDIT:
As noted below, it's not the preprocessor but the compiler that does the concatenation.
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Merge and interleave two arrays in Ruby
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What if a has more than 3 elements?
– Michael Kohl
Sep 5 '11 at 21:17
116
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TypeScript and field initializers
... address?: string,
age?: number
}) {
if (fields) Object.assign(this, fields);
}
}
or do it manually (bit more safe):
if (fields) {
this.name = fields.name || this.name;
this.address = fields.address || this.address;
this.age = ...