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How to get the first line of a file in a bash script?
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Significantly more overhead than the read approach. $() forks off a subshell, and using an external command (any external command) means you're calling execve(), invoking the linker and loader (if it's using shared libraries, which is usually the case), etc.
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Add zero-padding to a string
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"1.2".PadRight(4,'0') also works for zero filling a string number such as "1.20". I can do this to truncate and fill a simple string number < 10000. num = num.length > 4 ? num.Substring(0,4) : num.PadRight(4,'0');
– Dan Randolph
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Convert a string to int using sql query
...word: IsNumeric() can produce some perverse results. It will return TRUE for the string "-.", which will still cause an error when you try to cast it to a number.
– Curt
Jul 25 '13 at 2:22
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How SignalR works internally?
...s.
SignalR has a few built in transports:
WebSockets
Server Sent Events
Forever Frame
Long polling
SignalR tries to choose the "best" connection supported by server and client (you can also force it to use a specific transport).
That's the high level. If you want to see how each transport is ...
In Gradle, is there a better way to get Environment Variables?
...ks as well:
home = "$System.env.HOME"
It's not clear what you're aiming for.
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Difference between CPPFLAGS and CXXFLAGS in GNU Make
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CPPFLAGS is supposed to be for flags for the C PreProcessor; CXXFLAGS is for flags for the C++ compiler.
The default rules in make (on my machine, at any rate) pass CPPFLAGS to just about everything, CFLAGS is only passed when compiling and linking C,...
How to check if a value exists in an array in Ruby
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You're looking for include?:
>> ['Cat', 'Dog', 'Bird'].include? 'Dog'
=> true
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What exactly is Python multiprocessing Module's .join() Method Doing?
... not actually concatenating anything together. Rather, it just means "wait for this [thread/process] to complete". The name join is used because the multiprocessing module's API is meant to look as similar to the threading module's API, and the threading module uses join for its Thread object. Using...
Loop through an array php
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Using foreach loop without key
foreach($array as $item) {
echo $item['filename'];
echo $item['filepath'];
// to know what's in $item
echo '<pre>'; var_dump($item);
}
Using foreach loop with key
foreach($a...
How to count items in JSON object using command line?
....[]) return the length of each object in the root array, while I'm looking for the length of the root array itself. Need to fix to .
– Édouard Lopez
Jan 26 '14 at 9:52
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