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How to convert a string to lower case in Bash?
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The are various ways:
POSIX standard
tr
$ echo "$a" | tr '[:upper:]' '[:lower:]'
hi all
AWK
$ echo "$a" | awk '{print tolower($0)}'
hi all
Non-POSIX
You may run into portability issues with the following examples:
Bash 4.0
$ echo "${a,,}"
hi all...
UICollectionView's cellForItemAtIndexPath is not being called
Only my second time using UICollectionView's and perhaps I have bitten off more than I can chew but nevertheless:
31 Answer...
Override intranet compatibility mode IE8
...hanging the meta header to IE8, but it doesn't acknowledge the meta header and just uses the browser setting. Does anyone know how to disable this?
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Double vs single quotes
I'm really new to Ruby and I'm trying to understand if there's a specific time when I should use "" vs '' .
8 Answers
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How to implement WiX installer upgrade?
...omatic upgrades. It prevents downgrades, giving a localised error message, and also prevents upgrading an already existing identical version (i.e. only lower versions are upgraded):
<MajorUpgrade
AllowDowngrades="no" DowngradeErrorMessage="!(loc.NewerVersionInstalled)"
AllowSameVersionUp...
DynamoDB vs MongoDB NoSQL [closed]
...ject, we plan to store from about 500k records per month in the first year and maybe more for the next years this is a vertical application so there's no need to use a database for this, that's the reason why I decided to choose a noSQL data storage.
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Express.js - app.listen vs server.listen
... get it. What is the difference between creating an app using Express.js and starting the app listening on port 1234, for example:
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Python integer incrementing with ++ [duplicate]
I've always laughed to myself when I've looked back at my VB6 days and thought, "What modern language doesn't allow incrementing with double plus signs?":
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How to get Enum Value from index in Java?
...er loop of performance sensitive code you might want to make a static copy and use that.
– Christopher Barber
Oct 4 '13 at 0:11
1
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When exactly is it leak safe to use (anonymous) inner classes?
I have been reading some articles on memory leaks in Android and watched this interesting video from Google I/O on the subject .
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