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How do I generate a random int number?
... number in the same second from different threads.
– testing
Sep 12 '17 at 16:26
1
@testing: I ag...
Reset C int array to zero : the fastest way?
...int, unsigned int, long long int or unsigned long long int, what is the fastest way to reset all its content to zero (not only for initialization but to reset the content several times in my program)? Maybe with memset?
...
Check if item is in an array / list
...or arrays.
for example say you have dataframe which has a column name ie, test['Name'], you can do
if name in test['Name'].values :
print(name)
for a normal list you dont have to use .values
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Possibility of duplicate Mongo ObjectId's being generated in two different collections?
... design that relied on _id uniqueness across collections.
One can easily test this in the mongo shell:
MongoDB shell version: 1.6.5
connecting to: test
> db.foo.insert({_id: 'abc'})
> db.bar.insert({_id: 'abc'})
> db.foo.find({_id: 'abc'})
{ "_id" : "abc" }
> db.bar.find({_id: 'abc'})...
How to get overall CPU usage (e.g. 57%) on Linux [closed]
...ts before copy-paste this or using this for any serious work. This was not tested nor used, it's an idea for people who do not want to install a utility or for something that works in any distribution. Some people think you can "apt-get install" anything.
NOTE: this is not the current CPU usage, b...
SET NOCOUNT ON usage
...
The problem with this rule is just that it's harder to test for than "Is SET NOCOUNT ON at the top of the proc?"; I wonder whether SQL Analysis tools like Sql Enlight can test for that sort of thing... Adding it to my long-term todo list for my SQL formatter project :)
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Getting a better understanding of callback functions in JavaScript
...if the converted boolean returns true and then checking its type again and testing it against the string... Could you explain why?
– headacheCoder
Oct 21 '13 at 12:41
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Remove all special characters except space from a string using JavaScript
...an anything that's not letter, here is a solution:
const str = "abc's test#s";
console.log(str.replace(/[^a-zA-Z ]/g, ""));
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What is process.env.PORT in Node.js?
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terminal: set a new user environment variable, not permanently
export MY_TEST_PORT=9999
app.js: read the new environment variable from node app
console.log(process.env.MY_TEST_PORT)
terminal: run the node app and get the value
$ node app.js
9999
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Switch case with fallthrough?
...the first case.
If needed, you can omit ;; in the first case to continue testing for matches in following cases too. (;; jumps to esac)
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