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Flexbox: center horizontally and vertically

How to center div horizontally, and vertically within the container using flexbox. In below example, I want each number below each other (in rows), which are centered horizontally. ...
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Difference between CC, gcc and g++?

...t are the difference between the 3 compilers CC, gcc, g++ when compiling C and C++ code in terms of assembly code generation, available libraries, language features, etc.? ...
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Maintain the aspect ratio of a div with CSS

...rce: w3.org, emphasis mine) Padding-bottom values for other aspect ratios and 100% width : aspect ratio | padding-bottom value --------------|---------------------- 16:9 | 56.25% 4:3 | 75% 3:2 | 66.66% 8:5 | 62.5% Placing content in ...
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'sudo gem install' or 'gem install' and gem locations

Running ' sudo gem list --local ' and ' gem list --local ' give me differing results. My gem path is set to my home folder and only contains the gems from ' gem list --local '. ...
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Python list subtraction operation

...set(x) - set(y)) >>> z [0, 8, 2, 4, 6] Or you might just have x and y be sets so you don't have to do any conversions. share | improve this answer | follow ...
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Why isn't sizeof for a struct equal to the sum of sizeof of each member?

...y alignment constraints. Data structure alignment impacts both performance and correctness of programs: Mis-aligned access might be a hard error (often SIGBUS). Mis-aligned access might be a soft error. Either corrected in hardware, for a modest performance-degradation. Or corrected by emulation...
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How can I multiply all items in a list together with Python?

I need to write a function that takes a list of numbers and multiplies them together. Example: [1,2,3,4,5,6] will give me 1*2*3*4*5*6 . I could really use your help. ...
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How to get the IP address of the docker host from inside a docker container

... title says. I need to be able to retrieve the IP address the docker hosts and the portmaps from the host to the container, and doing that inside of the container. ...
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Manual deployment vs. Amazon Elastic Beanstalk

...tages we get by using Elastic Beanstalk over maually creating EC2 instance and setting up tomcat server and deploy etc for a typical java web applicaion. Are load balancing, Monitoring and autoscaling the only advantages? ...
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How expensive is RTTI?

I understand that there is a resource hit from using RTTI, but how big is it? Everywhere I've looked just says that "RTTI is expensive," but none of them actually give any benchmarks or quantitative data reguarding memory, processor time, or speed. ...