increment

问题 I am trying to write a for loop, where I have to increment exponentially. I am using stride function but it won't work. Here's c++ code, I am trying to write a swift version. for (int m = 1; m <= high - low; m = 2*m){} can you help me, to write this code in swift version? 回答1: A while-loop is probably the simplest solution, but here is an alternative: for m in sequence(first: 1, next: { 2 * $0 }).prefix(while: { $0 <= high - low }) { print(m) } sequence() (lazily) generates the sequence 1, 2,

问题 Below is the code on compiling this code in codeblocks I get the following error message: 1 value required as increment operator . Now I know that arr++ is not working but I want to know why. #include<stdio.h> int main() { int arr[5]={1,2,3,4,5},i; for(i=0;i<5;i++) { printf("%d\n",*arr); arr++; } return 0; } 回答1: arr++ is not working but i want to know why? arr stores the base address that is &arr[0] therefore, arr always points to the starting position of the array and can't be changed .

问题 I hope I'm overthinking this and there's an obvious solution. From the API (GET statuses/user_timeline) max_id - Returns results with an ID less than (that is, older than) or equal to the specified ID. "or equal to" means it will include the tweet with ID that I sent as my max_id parameter. -- My question is this: if I store the id of my oldest tweet (from a previous request), how can I subtract 1 from this id to exclude it from being returned in my next request? The obvious solution would be

问题 I hope I'm overthinking this and there's an obvious solution. From the API (GET statuses/user_timeline) max_id - Returns results with an ID less than (that is, older than) or equal to the specified ID. "or equal to" means it will include the tweet with ID that I sent as my max_id parameter. -- My question is this: if I store the id of my oldest tweet (from a previous request), how can I subtract 1 from this id to exclude it from being returned in my next request? The obvious solution would be

问题 I have field called ads_counter in my database, and I need to increase its value each time when this ad is rendered. I want to implement increment function of javascript in node rest api when be clicked by users I will get 1 in request I have increase no in database by 1 . for example If I have ads_counter = 5 and I get req from client side to increase no by 1 . so, how can I increase no. of ads_counter in database. I'm not able to understand from where to start I am using Sequelize with

问题 I have the following function: position_tab <- filter(Tall, Time_point == 2) %>% group_by(Object) %>% summarise(minimum = min(Pixel_pos), maximum = max(Pixel_pos)) position_tab_2 <- mutate(position_tab, midpoint = minimum + ((maximum - minimum)/2)) Which produces: Object minimum maximum midpoint 1 4 22 13 2 39 85 62 etc.. This is filtering for a given timepoint, and creating a new dataframe with the midpoint variable added. Is there a way to loop this in increments of + one, so that the

问题 I have the following function: position_tab <- filter(Tall, Time_point == 2) %>% group_by(Object) %>% summarise(minimum = min(Pixel_pos), maximum = max(Pixel_pos)) position_tab_2 <- mutate(position_tab, midpoint = minimum + ((maximum - minimum)/2)) Which produces: Object minimum maximum midpoint 1 4 22 13 2 39 85 62 etc.. This is filtering for a given timepoint, and creating a new dataframe with the midpoint variable added. Is there a way to loop this in increments of + one, so that the

问题 I'm trying to generate a ticket id value with this format: yymm###### to be used in my database table. This expresses a 2-digit year, 2-digit month, and a 6-digit numeric id that is unique to the year-month prefix. If there are no other tickets id's for the current month and year (April of 2017 at time of posting), the the numeric portion of the value should be default to 000000 . The correct generated ticket id, in this case, should be: 1704000000 . If there are 1 or more pre-existing ticket

问题 I'm trying to do the following: function func() # in practice: logs the output of a code block to a file { if [ -z "$c" ]; then c=1 else (( ++c )) fi tee -a /dev/null echo "#$c" } { echo -n "test" } | func { echo -n "test" } | func But the increment doesn't work, the variable c stays '1'. I've seen this thread, but it doesn't work for my case - when I try it, a syntax error appears. 回答1: The trick in the linked question works for me: #!/bin/bash function func() # in practice: logs the output

问题 Basically what I'm looking for is the PHP version of this thread: Find, replace, and increment at each occurence of string I would like to replace the keyword following > at the start of rach line with an incrementing counter. If my input is: >num, blah, blah, blah ATCGACTGAATCGA >num, blah, blah, blah ATCGATCGATCGATCG >num, blah, blah, blah ATCGATCGATCGATCG I would like it to be... >0, blah, blah, blah ATCGACTGAATCGA >1, blah, blah, blah ATCGATCGATCGATCG >2, blah, blah, blah ATCGATCGATCGATCG