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How to create a file with a given size in Linux?
...le. A non-sparse file has its blocks (allocation units) allocated ahead of time which means the space is reserved as far as the file system sees it. Also fallocate nor truncate will not set the contents of the file to a specified value like dd, instead the contents of a file allocated with fallocate...
Git pre-push hooks
...it pushes and starts another push in another thread, if the first one push times out, the second one from another thread works for me. If either first and second succeeds, then the first pushes changes, and the second pushes nothing. The trick is that i had some argument added, which bypasses unit t...
An invalid form control with name='' is not focusable
...ield" next to it fails as well.
A form control may not be focusable at the time validation is triggered for several reasons. The two scenarios described below are the most prominent causes:
The field is irrelevant according to the current context of the business logic. In such a scenario, the respe...
Why is === faster than == in PHP?
...ntegers [1, 100]
the two variables were generated and compared one million times
the tests were run 10 times
And here are the results:
$a == $b $a === $b
--------- ---------
0.765770 0.762020
0.753041 0.825965
0.770631 0.783696
0.787824 0.781129
0.757506 0.796142
0.773537 0.796734
0...
Jump to function definition in vim
...earch for its definition.
--Edit--
Although I've been using g* for a long time, I've recently discovered two shortcuts for these shortcuts!
(a) * will jump to the next occurrence of the word under the cursor. (No need to type the g, the 'goto' command in vi).
(b) # goes to the previous occurrenc...
Can modules have properties the same way that objects can?
...s made in the module containing the class will not be "visible" during run time, etc...
– tutuDajuju
Nov 1 '16 at 9:41
...
How to delete the contents of a folder?
...cursively looks into subdirectories when you try to advance it, and by the time you've done your first iteration of this loop, there are no subdirectories left to look at. In essence, os.walk is just being used here as an alternative way of distinguishing top-level folders from top-level files; the ...
Why does C++ compilation take so long?
Compiling a C++ file takes a very long time when compared to C# and Java. It takes significantly longer to compile a C++ file than it would to run a normal size Python script. I'm currently using VC++ but it's the same with any compiler. Why is this?
...
Why do stacks typically grow downwards?
...nd me. I still remember the TRS-80 model 3 method for getting the date and time being to ask the user for it at boot time. Having a memory scanner to set the upper limit of memory was considered state of the art back in the day :-) Can you imagine what would happen if Windows asked the time, or how ...
Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php
...created a recursive function - and thus it ran out of memory at any random time during code execution. This had the upside of me now having the world's most memory efficient code, created in the hunt for a memory leak.
– Kris Selbekk
Oct 15 '13 at 18:13
...