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How to convert a string to lower case in Bash?
...
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...
When to use NSInteger vs. int
...nteger/NSUInteger are defined as *dynamic typedef*s to one of these types, and they are defined like this:
#if __LP64__ || TARGET_OS_EMBEDDED || TARGET_OS_IPHONE || TARGET_OS_WIN32 || NS_BUILD_32_LIKE_64
typedef long NSInteger;
typedef unsigned long NSUInteger;
#else
typedef int NSInteger;
typedef ...
How to determine the number of days in a month in SQL Server?
...henever a valid date is provided without crazy workarounds for niche cases and is far simpler code - I'd highly recommend anyone on T-SQL stick to getting the day component of the eomonth output.
– bsplosion
May 10 '19 at 18:15
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Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
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[[ has fewer surprises and is generally safer to use. But it is not portable - POSIX doesn't specify what it does and only some shells support it (beside bash, I heard ksh supports it too). For example, you can do
[[ -e $b ]]
to test whether a ...
Number of elements in a javascript object
... implementations might keep track of such a value internally, there's no standard way to get it.
In the past, Mozilla's Javascript variant exposed the non-standard __count__, but it has been removed with version 1.8.5.
For cross-browser scripting you're stuck with explicitly iterating over the pro...
How do I pass a command line argument while starting up GDB in Linux? [duplicate]
... has errors in it as part of my assignment. However, I must first pass command line arguments in order to solve this problem.
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How to delete cookies on an ASP.NET website
...ateTime.Now.AddDays(-1);
}
But it also makes sense to use
Session.Abandon();
besides in many scenarios.
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How to get datetime in JavaScript?
... answered Apr 30 '14 at 17:34
Andrew MaoAndrew Mao
30.2k1616 gold badges118118 silver badges205205 bronze badges
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How do I create a custom Error in JavaScript?
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Update your code to assign your prototype to the Error.prototype and the instanceof and your asserts work.
function NotImplementedError(message) {
this.name = "NotImplementedError";
this.message = (message || "");
}
NotImplementedError.prototype = Error.prototype;
However, I wou...
Add only non-whitespace changes
... text editor to automatically trim trailing whitespace upon saving a file, and I am contributing to an open source project that has severe problems with trailing whitespace.
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