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Check if bash variable equals 0 [duplicate]
... NUM1 -le NUM2 returns true if NUM1 is less than or equal to NUM2.
For example
if [[ $age > 21 ]] # bad, > is a string comparison operator
if [ $age > 21 ] # bad, > is a redirection operator
if [[ $age -gt 21 ]] # okay, but fails if $age is not numeric
if (( $age > 21 )) # best,...
How to run a shell script at startup
... top to schedule it to run when the system starts?
– amphibient
May 8 '14 at 19:33
4
@amphibient ...
Expand/collapse section in UITableView in iOS
...
@mjdth plz give me any sample code bcz i need a specific cell hide/unhide ..thanks in advance
– Bajaj
Mar 8 '13 at 5:40
11
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Checking if a variable is not nil and not zero in ruby
...tly the guide recommends pretending or and and don't exist (|| is that or && and?)
– user3125280
Aug 24 '14 at 15:33
69
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Python name mangling
...ld Python guys despise this default - but it is the default anyway, so I really recommend you to follow it, even if you feel uncomfortable.
If you really want to send the message "Can't touch this!" to your users, the usual way is to precede the variable with one underscore. This is just a conventi...
Compare object instances for equality by their attributes
...s:
>>> x == y
True
Note that implementing __eq__ will automatically make instances of your class unhashable, which means they can't be stored in sets and dicts. If you're not modelling an immutable type (i.e. if the attributes foo and bar may change value within the lifetime of your obje...
Explicitly calling return in a function or not
...ek from the R core team (I believe) for recommending a user to explicitly calling return at the end of a function (his comment was deleted though):
...
UIImage: Resize, then Crop
I've been bashing my face into this one for literally days now and even though I feel constantly that I am right on the edge of revelation, I simply cannot achieve my goal.
...
Image, saved to sdcard, doesn't appear in Android's Gallery app
... the sdcard and it doesn't appear in the Gallery application until I pull off the sdcard and return it back.
17 Answers
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Why is System.Web.Mvc not listed in Add References?
...et.Mvc has dependencies on:
'Microsoft.AspNet.WebPages (≥ 2.0.20710.0 && < 2.1)'
'Microsoft.Web.Infrastructure (≥ 1.0.0.0)'
'Microsoft.AspNet.Razor (≥ 2.0.20710.0 && < 2.1)'
...which seems like no biggie to me. In our case, this is a class library that exists solely ...