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“Could not find bundler” error
... This happened for me after installing a new version of ruby using rvm. Then I had to run gem install bundler again
– NRR
Jun 10 '16 at 16:54
add a comment
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rbenv not changing ruby version
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On OSX, don't forget to log out of your OSX session and then log back in for the changes to your bash profile to take effect.
– Jeremy Ricketts
Mar 21 '13 at 2:22
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How do iOS Push Notifications work?
...ing/socket kind of connection always with APN service? If such is the case then how does APN service handle so many connections - If a server can hold 50k connections and there are 500 million users always, service at least needs 10000 servers right. Is this a practical scenario?
...
Maximum single-sell profit
...this by splitting the input in half, solving the problem in each subarray, then combining the two together. Turns out we actually can do this, and can do so efficiently! The intuition is as follows. If we have a single day, the best option is to buy on that day and then sell it back on the same d...
What part of Hindley-Milner do you not understand?
...t "[above] implies [below]".
If there are multiple expressions in [above], then consider them anded together; all of the [above] must be true in order to guarantee the [below].
: means has type
∈ means is in. (Likewise ∉ means "is not in".)
Γ is usually used to refer to an environment or contex...
How do I edit /etc/sudoers from a script?
...ions and "hack" problems with Brian's solution.
#!/bin/sh
if [ -z "$1" ]; then
echo "Starting up visudo with this script as first parameter"
export EDITOR=$0 && sudo -E visudo
else
echo "Changing sudoers"
echo "# Dummy change to sudoers" >> $1
fi
This script will add the lin...
How to write a Unit Test?
... your project name and click on finish.
3- Right click on your project. Then, click on New -> Class.
4- Write down your class name and click on finish.
Then, complete the class like this:
public class Math {
int a, b;
Math(int a, int b) {
this.a = a;
this.b = b;...
Why is a boolean 1 byte and not 1 bit of size?
...
I think bt addresses a byte offset and then tests the bit at a given offset, regardless, when specifying an address you go in bytes...bit offset literals would get a bit wordy (excuse the pun).
– user7116
Jan 7 '11 at 16:12
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How to exit if a command failed?
..., f the expression is of the form "p OR q", and p is evaluated to be true, then there is no reason to even look at q. If the expression is of the form "p AND q", and p is evaluated to be false, there is no reason to look at q. The reason for this is two-fold: 1) its faster, for obvious reasons and 2...
How to fully delete a git repository created with init?
...ndows 7, you need to go to your folder, click on Organize on the top left, then click on Folder and search options, then click on the View tab and click on the Show hidden files, folders and drives radio button.
On a Mac OS:
Open a Terminal (via Spotlight: press CMD + SPACE, type terminal and pres...