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Is there a performance impact when calling ToList()?
...mall the size is doubled so the backing array grows like this 4, 8, 16, 32 etc. Every time the backing array grows it has to be reallocated and all elements stored so far have to be copied. This operation is much more costly compared to the first case where an array of the correct size can be create...
How to split text without spaces into list of words?
...reenappleactiveassignmentweeklymetapho
rapparentlytherearethumbgreenappleetcinthestringialsohavealargedictionarytoquery
whetherthewordisreasonablesowhatsthefastestwayofextractionthxalot.
After: there is masses of text information of peoples comments which is parsed from html but there are n...
how to find host name from IP with out login to the host
...ch use names to identify hosts including DNS, DHCP, LDAP (DN's), hostname, etc. and many systems use zeroconf to synchronize names between multiple naming systems. For this reason, results from hostname will sometimes match results from dig (see below) or other naming systems, but often times they w...
Creating Multifield Indexes in Mongoose / MongoDB
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@DamonYuan They set the sort order of the fields in the index. 1 is ascending, -1 would be descending.
– JohnnyHK
Oct 27 '15 at 0:05
1...
Why can't I use background image and color together?
...aph-paper with light blue tint, if you had the png. Note that the stacking order might work in reverse to your mental model, with the first item being on top.
Excellent documentation by Mozilla, here:
https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Using_multiple_backgrounds
Tool for build...
How to set environment variable or system property in spring tests?
...u have definitions via @TestPropertySource or a similar method - the exact order in which properties are loaded can be found in the Spring documentation chapter 24. Externalized Configuration.
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How to uninstall Jenkins?
...script in newer Jenkins versions, and should be executed too:
sudo rm -f /etc/newsyslog.d/jenkins.conf
pkgutil --pkgs | grep 'org\.jenkins-ci\.' | xargs -n 1 sudo pkgutil --forget
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How to design a database for User Defined Fields?
...ve complete control to use data types,
check constraints, default values, etc.
to define the data domains. Don't underestimate the performance hit resulting from on-the-fly data type conversion. Such
constraints also help RDBMS query
optimizers develop more effective
plans.
Should you ever need to...
How to Compare Flags in C#?
...al times and got ~500ms for HasFlags and ~32ms for bitwise. While still an order of magnitude faster with bitwise, HasFlags was an order of magnitude down from your test. (Ran the test on a 2.5GHz Core i3 and .NET 4.5)
– MarioVW
Jun 26 '13 at 17:13
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Convert object to JSON in Android
...elimiters of objects and arrays.
The tokens are traversed in depth-first order, the same order that
they appear in the JSON document. Within JSON objects, name/value
pairs are represented by a single token.
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